Bio Flashcards
(267 cards)
1
Q
A
2
Q
What is biology?
A
Biology is the study of living things or organisms.
3
Q
What is nutrition?
A
Nutrition is the taking in of materials for energy, growth, and development.
4
Q
What do plants require for nutrition?
A
Plants require light, carbon dioxide, water, and ions.
5
Q
What do animals need for nutrition?
A
Animals need organic compounds, ions, and usually water.
6
Q
What is excretion?
A
Excretion is the removal of toxic materials, waste products of metabolism, and substances in excess from organisms.
7
Q
What is respiration?
A
Respiration is the chemical reactions in cells that break down nutrient molecules and release energy for metabolism.
8
Q
What is sensitivity in biology?
A
Sensitivity is the ability to detect or sense stimuli in the internal or external environment and to make appropriate responses.
9
Q
What are stimuli?
A
Stimuli are changes in the environment.
10
Q
What is reproduction?
A
Reproduction is the processes that make more of the same kind of organism.
11
Q
What is growth?
A
Growth is a permanent increase in size and dry mass by an increase in cell number or cell size or both.
12
Q
What is movement in organisms?
A
Movement is an action by an organism or part of an organism causing a change of position or place.
13
Q
What is the binomial system?
A
The binomial system is an internationally agreed system of naming species with a scientific name made up of 2 parts showing the genus and species.
14
Q
What are cells?
A
Cells are the smallest, basic functioning units of a living organism.
15
Q
What is tissue?
A
Tissue is a group of cells with similar structures, working together to perform a shared function.
16
Q
What is an organ?
A
An organ is a structure made up of a group of tissues, working together to perform specific functions.
17
Q
What is an organ system?
A
An organ system is a group of organs with related functions, working together to perform body functions.
18
Q
What is diffusion?
A
Diffusion is the net movement of particles from a region of higher concentration to a region of lower concentration down a concentration gradient.
19
Q
What is active transport?
A
Active transport is the movement of particles through a cell membrane from a region of lower concentration to a region of higher concentration using energy from respiration.
20
Q
What is osmosis?
A
Osmosis is the net movement of water molecules from a region of higher water potential to a region of lower water potential through a partially permeable membrane.
21
Q
What is a catalyst?
A
A catalyst is a substance that increases the rate of a chemical reaction and is not changed by the reaction.
22
Q
What are enzymes?
A
Enzymes are proteins that function as biological catalysts.
23
Q
What is a substrate?
A
The substrate is the substance on which an enzyme acts.
24
Q
What is a product in a chemical reaction?
A
The product is the substance which is made by the reaction.
25
What is photosynthesis?
Photosynthesis is the process by which plants manufacture carbohydrates from raw materials using energy from light.
26
What are stomata?
Stomata are small openings in the lower epidermis that allow gas exchange between the leaf and the air.
27
What is a limiting factor?
A limiting factor is something present in the environment in such short supply that it restricts life processes.
28
What is a balanced diet?
A balanced diet contains all essential nutrients in the correct amounts and proportions.
29
What are vitamins?
Vitamins are organic substances needed in tiny amounts; deficiency can lead to diseases.
30
What are minerals?
Minerals are inorganic substances needed in small amounts in the diet.
31
What is ingestion?
Ingestion is the process of taking substances such as food and drink into the body through the mouth.
32
What is mechanical digestion?
Mechanical digestion is the breaking down of food into smaller pieces without chemical change to the food molecule.
33
What is chemical digestion?
Chemical digestion is the breakdown of large, insoluble molecules into small, soluble molecules.
34
What is absorption of food?
Absorption of food is the movement of small food molecules and ions through the wall of the small intestine into the blood.
35
What is assimilation of food?
Assimilation of food is the movement of digested food molecules into the cells of the body where they are used.
36
What is egestion?
Egestion is the passing out of undigested or unabsorbed food as faeces through the anus.
37
What is fluoridation?
Fluoridation means adding fluoride to drinking water in very small quantities.
38
What is peristalsis?
Peristalsis is the rhythmic contractions of muscles in the walls of tubes to squeeze contents along.
39
What is transpiration?
Transpiration is the loss of water vapor from plant leaves by evaporation followed by diffusion through stomata.
40
What is translocation?
Translocation is the movement of sucrose and amino acids in phloem from regions of production to regions of storage or use.
41
What are arteries?
Arteries are blood vessels that carry blood away from the heart to the body.
42
What are capillaries?
Capillaries are very small blood vessels that penetrate every part of the body.
43
What are veins?
Veins are blood vessels that transport blood from the body to the heart.
44
What are shunt vessels?
Shunt vessels link an artery directly to a vein, allowing blood to bypass capillaries.
45
What is blood pressure?
Blood pressure is the pressure created in arteries due to the flow of blood during heartbeats.
46
What is a pathogen?
A pathogen is a disease-causing organism.
47
What is a transmissible disease?
A transmissible disease is one in which the pathogen can be passed from one host to another.
48
What is transmission?
Transmission is the passing of a pathogen to an uninfected person.
49
What is infection?
Infection is the entry of the pathogen into the body.
50
What is active immunity?
Active immunity is defense against a pathogen by antibody production in the body.
51
What is a host?
A host is the person or animal in which the pathogen lives and breeds.
52
What is aerobic respiration?
Aerobic respiration is the chemical reactions in cells that use oxygen to break down nutrient molecules to release energy.
53
What is anaerobic respiration in yeasts?
Anaerobic respiration in yeasts is the breakdown of nutrient molecules to release energy without using oxygen.
54
What is oxygen debt?
Oxygen debt is the amount of oxygen needed to oxidize lactic acid accumulated due to anaerobic respiration.
55
What is a receptor?
A receptor is a specialized cell that senses a stimulus.
56
What is an effector?
An effector is a structure that responds to a stimulus.
57
What is coordination in biology?
Coordination is the way receptors pick up stimuli and pass information to effectors.
58
What is a nerve impulse?
A nerve impulse is an electrical signal that passes along nerve cells called neurones.
59
What is a reflex action?
A reflex action is an automatic, involuntary rapid response to a stimulus.
60
What is a reflex arc?
A reflex arc is the pathway along which the nerve impulse passes from the receptor to the effector.
61
What are involuntary actions?
Involuntary actions are not under conscious control.
62
What are voluntary actions?
Voluntary actions are actions that happen because we decide to carry them out.
63
What is a synapse?
A synapse is a junction between two neurones, consisting of a gap across which impulses pass by diffusion of a neurotransmitter.
64
What are sense organs?
Sense organs are groups of receptor cells responding to specific stimuli: light, sound, touch, temperature, and chemicals.
65
What is accommodation in biology?
Accommodation is the adjustment in the shape of the lens to focus light from different distances.
66
What is a hormone?
A hormone is a chemical substance produced by a gland, carried by the blood, which alters the activity of specific target organs.
67
What is a tropism?
A tropism is a growth response by a plant affected by the direction of the stimulus.
68
What is gravitropism?
Gravitropism is a response in which parts of a plant grow towards or away from gravity.
69
What is phototropism?
Phototropism is a response in which parts of a plant grow towards or away from the direction of light.
70
What is homeostasis?
Homeostasis is the maintenance of a constant internal environment.
71
What is deamination?
Deamination is the removal of the nitrogen-containing part of amino acids to form urea.
72
What is a drug?
A drug is any substance taken into the body that modifies or affects chemical reactions.
73
What is asexual reproduction?
Asexual reproduction is the process resulting in the production of genetically identical offspring from one parent.
74
What is sexual reproduction?
Sexual reproduction is the process involving the fusion of the nuclei of two gametes to form a zygote.
75
What is fertilization?
Fertilization is the joining of male nuclei.
76
What is pollination?
Pollination is the transfer of pollen grains from the anther to the stigma.
77
What is self-pollination?
Self-pollination is the transfer of pollen grains from the anther of a flower to the stigma of the same flower.
78
What is cross-pollination?
Cross-pollination is the transfer of pollen grains from the anther of a flower to the stigma of a flower on a different plant.
79
What is puberty?
Puberty is the stage where the human body starts to release gametes.
80
What is artificial insemination?
Artificial insemination is a technique where sperm are placed into the vagina, cervix, fallopian tubes, or uterus around ovulation.
81
What are fertility drugs?
Fertility drugs are used to stimulate the development and production of ova by ovaries.
82
What are sexually transmitted infections (STIs)?
STIs are infections transmitted via body fluids through sexual contact.
83
What is a chromosome?
A chromosome is a thread-like structure of DNA carrying genetic information in the form of genes.
84
What is a gene?
A gene is a length of DNA that codes for a protein.
85
What is inheritance?
Inheritance is the transmission of genetic information from generation to generation.
86
What is a haploid nucleus?
A haploid nucleus contains a single set of unpaired chromosomes.
87
What is a diploid nucleus?
A diploid nucleus contains two sets of chromosomes.
88
What is an allele?
An allele is a version of a gene.
89
What are homologous chromosomes?
Homologous chromosomes carry genes for the same characteristics in the same position.
90
What is duplication in cell division?
Duplication is the copying of chromosomes in the parent cell before mitosis.
91
What is meiosis?
Meiosis is reduction division in which the chromosome number is halved from diploid to haploid.
92
What is mitosis?
Mitosis is a type of nuclear division resulting in genetically identical cells.
93
What are stem cells?
Stem cells are unspecialized cells that divide by mitosis to produce daughter cells and become specialized.
94
What is genotype?
Genotype is the genetic makeup of an organism in terms of the alleles present.
95
What is phenotype?
Phenotype is the observable features of an organism.
96
What is homozygous?
Homozygous is having two identical alleles of a particular gene.
97
What is heterozygous?
Heterozygous is having two different alleles of a particular gene.
98
What is a dominant allele?
A dominant allele is expressed if it is present.
99
What is a recessive allele?
A recessive allele is only expressed when there is no dominant allele present.
100
What is sex linkage?
Sex linkage is the inheritance of genes carried on the sex chromosomes.
101
What is a sex-linked characteristic?
A sex-linked characteristic is one where the gene responsible is located on a sex chromosome.
102
What is mutation?
Mutation is a genetic change.
103
What is gene mutation?
Gene mutation is a change in the base sequence of DNA.
104
What is variation?
Variation refers to differences between individuals of the same species.
105
What is phenotypic variation?
Phenotypic variation refers to differences between the features of different individuals.
106
What is discontinuous variation?
Discontinuous variation is caused by genes alone, resulting in distinct phenotypes.
107
What is continuous variation?
Continuous variation occurs when characteristics are determined by many pairs of alleles.
108
What is an adaptive feature?
An adaptive feature is an inherited functional feature that increases an organism's fitness.
109
What is fitness in biology?
Fitness is the probability of an organism surviving and reproducing in its environment.
110
What is selection?
Selection is the process of choosing the best varieties adapted to the environment.
111
What is evolution?
Evolution is the change in adaptive features of a population over time due to natural selection.
112
What is adaptation?
Adaptation is the process by which populations become more suited to their environment over generations.
113
What is artificial selection?
Artificial selection is a process carried out by humans to breed the best varieties of plants and animals.
114
What is ecology?
Ecology is the study of interactions between living organisms and their environment.
115
What is the environment?
The environment is everything that surrounds an organism, affecting it and being affected by it.
116
What is a habitat?
A habitat is the area where an organism lives.
117
What is a population?
A population is a group of organisms of one species living in the same area at the same time.
118
What is a community in ecology?
A community is all of the populations of different species in an ecosystem.
119
What is an ecosystem?
An ecosystem is a unit containing the community of organisms and their environment interacting together.
120
What is a food chain?
A food chain is a diagram showing the transfer of energy from one organism to the next, beginning with a producer.
121
What is a trophic level?
A trophic level is the position of an organism in a food chain, food web, or pyramid.
122
What is a herbivore?
A herbivore is an animal that gets its energy by eating plants.
123
What is a carnivore?
A carnivore is an animal that gets its energy by eating other animals.
124
What is an omnivore?
An omnivore is an animal that gets its energy by eating plants and other animals.
125
What is a food web?
A food web is a network of interconnected food chains.
126
What is a producer?
A producer is an organism that makes its own organic nutrients, usually through photosynthesis.
127
What is a consumer?
A consumer is an organism that gets its energy by feeding on other organisms.
128
What is a decomposer?
A decomposer is an organism that gets its energy from dead or waste organic matter.
129
What is fermentation?
Fermentation is the breaking down of sugar to alcohol and carbon dioxide in the absence of oxygen.
130
What is genetic engineering?
Genetic engineering is changing the genetic material of an organism by removing, changing, or inserting individual genes.
131
What is pollution?
Pollution is the presence of a harmful substance in the environment.
132
What is conservation?
Conservation is the process of looking after the natural environment.
133
What is a sustainable resource?
A sustainable resource is produced as rapidly as it is removed from the environment.
134
What is sustainable development?
Sustainable development provides for the needs of an increasing human population without harming the environment.
135
What is biology?
Biology is the study of living things or organisms.
136
What is nutrition?
Nutrition is the taking in of materials for energy, growth, and development.
137
What do plants require for nutrition?
Plants require light, carbon dioxide, water, and ions.
138
What do animals need for nutrition?
Animals need organic compounds, ions, and usually water.
139
What is excretion?
Excretion is the removal of toxic materials, waste products of metabolism, and substances in excess from organisms.
140
What is respiration?
Respiration is the chemical reactions in cells that break down nutrient molecules and release energy for metabolism.
141
What is sensitivity in biology?
Sensitivity is the ability to detect or sense stimuli in the internal or external environment and to make appropriate responses.
142
What are stimuli?
Stimuli are changes in the environment.
143
What is reproduction?
Reproduction is the processes that make more of the same kind of organism.
144
What is growth?
Growth is a permanent increase in size and dry mass by an increase in cell number or cell size or both.
145
What is movement in organisms?
Movement is an action by an organism or part of an organism causing a change of position or place.
146
What is the binomial system?
The binomial system is an internationally agreed system of naming species with a scientific name made up of 2 parts showing the genus and species.
147
What are cells?
Cells are the smallest, basic functioning units of a living organism.
148
What is tissue?
Tissue is a group of cells with similar structures, working together to perform a shared function.
149
What is an organ?
An organ is a structure made up of a group of tissues, working together to perform specific functions.
150
What is an organ system?
An organ system is a group of organs with related functions, working together to perform body functions.
151
What is diffusion?
Diffusion is the net movement of particles from a region of higher concentration to a region of lower concentration down a concentration gradient.
152
What is active transport?
Active transport is the movement of particles through a cell membrane from a region of lower concentration to a region of higher concentration using energy from respiration.
153
What is osmosis?
Osmosis is the net movement of water molecules from a region of higher water potential to a region of lower water potential through a partially permeable membrane.
154
What is a catalyst?
A catalyst is a substance that increases the rate of a chemical reaction and is not changed by the reaction.
155
What are enzymes?
Enzymes are proteins that function as biological catalysts.
156
What is a substrate?
The substrate is the substance on which an enzyme acts.
157
What is a product in a chemical reaction?
The product is the substance which is made by the reaction.
158
What is photosynthesis?
Photosynthesis is the process by which plants manufacture carbohydrates from raw materials using energy from light.
159
What are stomata?
Stomata are small openings in the lower epidermis that allow gas exchange between the leaf and the air.
160
What is a limiting factor?
A limiting factor is something present in the environment in such short supply that it restricts life processes.
161
What is a balanced diet?
A balanced diet contains all essential nutrients in the correct amounts and proportions.
162
What are vitamins?
Vitamins are organic substances needed in tiny amounts; deficiency can lead to diseases.
163
What are minerals?
Minerals are inorganic substances needed in small amounts in the diet.
164
What is ingestion?
Ingestion is the process of taking substances such as food and drink into the body through the mouth.
165
What is mechanical digestion?
Mechanical digestion is the breaking down of food into smaller pieces without chemical change to the food molecule.
166
What is chemical digestion?
Chemical digestion is the breakdown of large, insoluble molecules into small, soluble molecules.
167
What is absorption of food?
Absorption of food is the movement of small food molecules and ions through the wall of the small intestine into the blood.
168
What is assimilation of food?
Assimilation of food is the movement of digested food molecules into the cells of the body where they are used.
169
What is egestion?
Egestion is the passing out of undigested or unabsorbed food as faeces through the anus.
170
What is fluoridation?
Fluoridation means adding fluoride to drinking water in very small quantities.
171
What is peristalsis?
Peristalsis is the rhythmic contractions of muscles in the walls of tubes to squeeze contents along.
172
What is transpiration?
Transpiration is the loss of water vapor from plant leaves by evaporation followed by diffusion through stomata.
173
What is translocation?
Translocation is the movement of sucrose and amino acids in phloem from regions of production to regions of storage or use.
174
What are arteries?
Arteries are blood vessels that carry blood away from the heart to the body.
175
What are capillaries?
Capillaries are very small blood vessels that penetrate every part of the body.
176
What are veins?
Veins are blood vessels that transport blood from the body to the heart.
177
What are shunt vessels?
Shunt vessels link an artery directly to a vein, allowing blood to bypass capillaries.
178
What is blood pressure?
Blood pressure is the pressure created in arteries due to the flow of blood during heartbeats.
179
What is a pathogen?
A pathogen is a disease-causing organism.
180
What is a transmissible disease?
A transmissible disease is one in which the pathogen can be passed from one host to another.
181
What is transmission?
Transmission is the passing of a pathogen to an uninfected person.
182
What is infection?
Infection is the entry of the pathogen into the body.
183
What is active immunity?
Active immunity is defense against a pathogen by antibody production in the body.
184
What is a host?
A host is the person or animal in which the pathogen lives and breeds.
185
What is aerobic respiration?
Aerobic respiration is the chemical reactions in cells that use oxygen to break down nutrient molecules to release energy.
186
What is anaerobic respiration in yeasts?
Anaerobic respiration in yeasts is the breakdown of nutrient molecules to release energy without using oxygen.
187
What is oxygen debt?
Oxygen debt is the amount of oxygen needed to oxidize lactic acid accumulated due to anaerobic respiration.
188
What is a receptor?
A receptor is a specialized cell that senses a stimulus.
189
What is an effector?
An effector is a structure that responds to a stimulus.
190
What is coordination in biology?
Coordination is the way receptors pick up stimuli and pass information to effectors.
191
What is a nerve impulse?
A nerve impulse is an electrical signal that passes along nerve cells called neurones.
192
What is a reflex action?
A reflex action is an automatic, involuntary rapid response to a stimulus.
193
What is a reflex arc?
A reflex arc is the pathway along which the nerve impulse passes from the receptor to the effector.
194
What are involuntary actions?
Involuntary actions are not under conscious control.
195
What are voluntary actions?
Voluntary actions are actions that happen because we decide to carry them out.
196
What is a synapse?
A synapse is a junction between two neurones, consisting of a gap across which impulses pass by diffusion of a neurotransmitter.
197
What are sense organs?
Sense organs are groups of receptor cells responding to specific stimuli: light, sound, touch, temperature, and chemicals.
198
What is accommodation in biology?
Accommodation is the adjustment in the shape of the lens to focus light from different distances.
199
What is a hormone?
A hormone is a chemical substance produced by a gland, carried by the blood, which alters the activity of specific target organs.
200
What is a tropism?
A tropism is a growth response by a plant affected by the direction of the stimulus.
201
What is gravitropism?
Gravitropism is a response in which parts of a plant grow towards or away from gravity.
202
What is phototropism?
Phototropism is a response in which parts of a plant grow towards or away from the direction of light.
203
What is homeostasis?
Homeostasis is the maintenance of a constant internal environment.
204
What is deamination?
Deamination is the removal of the nitrogen-containing part of amino acids to form urea.
205
What is a drug?
A drug is any substance taken into the body that modifies or affects chemical reactions.
206
What is asexual reproduction?
Asexual reproduction is the process resulting in the production of genetically identical offspring from one parent.
207
What is sexual reproduction?
Sexual reproduction is the process involving the fusion of the nuclei of two gametes to form a zygote.
208
What is fertilization?
Fertilization is the joining of male nuclei.
209
What is pollination?
Pollination is the transfer of pollen grains from the anther to the stigma.
210
What is self-pollination?
Self-pollination is the transfer of pollen grains from the anther of a flower to the stigma of the same flower.
211
What is cross-pollination?
Cross-pollination is the transfer of pollen grains from the anther of a flower to the stigma of a flower on a different plant.
212
What is puberty?
Puberty is the stage where the human body starts to release gametes.
213
What is artificial insemination?
Artificial insemination is a technique where sperm are placed into the vagina, cervix, fallopian tubes, or uterus around ovulation.
214
What are fertility drugs?
Fertility drugs are used to stimulate the development and production of ova by ovaries.
215
What are sexually transmitted infections (STIs)?
STIs are infections transmitted via body fluids through sexual contact.
216
What is a chromosome?
A chromosome is a thread-like structure of DNA carrying genetic information in the form of genes.
217
What is a gene?
A gene is a length of DNA that codes for a protein.
218
What is inheritance?
Inheritance is the transmission of genetic information from generation to generation.
219
What is a haploid nucleus?
A haploid nucleus contains a single set of unpaired chromosomes.
220
What is a diploid nucleus?
A diploid nucleus contains two sets of chromosomes.
221
What is an allele?
An allele is a version of a gene.
222
What are homologous chromosomes?
Homologous chromosomes carry genes for the same characteristics in the same position.
223
What is duplication in cell division?
Duplication is the copying of chromosomes in the parent cell before mitosis.
224
What is meiosis?
Meiosis is reduction division in which the chromosome number is halved from diploid to haploid.
225
What is mitosis?
Mitosis is a type of nuclear division resulting in genetically identical cells.
226
What are stem cells?
Stem cells are unspecialized cells that divide by mitosis to produce daughter cells and become specialized.
227
What is genotype?
Genotype is the genetic makeup of an organism in terms of the alleles present.
228
What is phenotype?
Phenotype is the observable features of an organism.
229
What is homozygous?
Homozygous is having two identical alleles of a particular gene.
230
What is heterozygous?
Heterozygous is having two different alleles of a particular gene.
231
What is a dominant allele?
A dominant allele is expressed if it is present.
232
What is a recessive allele?
A recessive allele is only expressed when there is no dominant allele present.
233
What is sex linkage?
Sex linkage is the inheritance of genes carried on the sex chromosomes.
234
What is a sex-linked characteristic?
A sex-linked characteristic is one where the gene responsible is located on a sex chromosome.
235
What is mutation?
Mutation is a genetic change.
236
What is gene mutation?
Gene mutation is a change in the base sequence of DNA.
237
What is variation?
Variation refers to differences between individuals of the same species.
238
What is phenotypic variation?
Phenotypic variation refers to differences between the features of different individuals.
239
What is discontinuous variation?
Discontinuous variation is caused by genes alone, resulting in distinct phenotypes.
240
What is continuous variation?
Continuous variation occurs when characteristics are determined by many pairs of alleles.
241
What is an adaptive feature?
An adaptive feature is an inherited functional feature that increases an organism's fitness.
242
What is fitness in biology?
Fitness is the probability of an organism surviving and reproducing in its environment.
243
What is selection?
Selection is the process of choosing the best varieties adapted to the environment.
244
What is evolution?
Evolution is the change in adaptive features of a population over time due to natural selection.
245
What is adaptation?
Adaptation is the process by which populations become more suited to their environment over generations.
246
What is artificial selection?
Artificial selection is a process carried out by humans to breed the best varieties of plants and animals.
247
What is ecology?
Ecology is the study of interactions between living organisms and their environment.
248
What is the environment?
The environment is everything that surrounds an organism, affecting it and being affected by it.
249
What is a habitat?
A habitat is the area where an organism lives.
250
What is a population?
A population is a group of organisms of one species living in the same area at the same time.
251
What is a community in ecology?
A community is all of the populations of different species in an ecosystem.
252
What is an ecosystem?
An ecosystem is a unit containing the community of organisms and their environment interacting together.
253
What is a food chain?
A food chain is a diagram showing the transfer of energy from one organism to the next, beginning with a producer.
254
What is a trophic level?
A trophic level is the position of an organism in a food chain, food web, or pyramid.
255
What is a herbivore?
A herbivore is an animal that gets its energy by eating plants.
256
What is a carnivore?
A carnivore is an animal that gets its energy by eating other animals.
257
What is an omnivore?
An omnivore is an animal that gets its energy by eating plants and other animals.
258
What is a food web?
A food web is a network of interconnected food chains.
259
What is a producer?
A producer is an organism that makes its own organic nutrients, usually through photosynthesis.
260
What is a consumer?
A consumer is an organism that gets its energy by feeding on other organisms.
261
What is a decomposer?
A decomposer is an organism that gets its energy from dead or waste organic matter.
262
What is fermentation?
Fermentation is the breaking down of sugar to alcohol and carbon dioxide in the absence of oxygen.
263
What is genetic engineering?
Genetic engineering is changing the genetic material of an organism by removing, changing, or inserting individual genes.
264
What is pollution?
Pollution is the presence of a harmful substance in the environment.
265
What is conservation?
Conservation is the process of looking after the natural environment.
266
What is a sustainable resource?
A sustainable resource is produced as rapidly as it is removed from the environment.
267
What is sustainable development?
Sustainable development provides for the needs of an increasing human population without harming the environment.
