Key terms YR1 & YR2 Flashcards

(60 cards)

1
Q

What are Abiotic Factors?

A

Non-living elements of an ecosystem, such as climate, temperature, water, and soil type.

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2
Q

What is Artificial Selection?

A

Human selection of individuals with desirable traits, such as larger udders or narrower body shape.

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3
Q

What is Biomass?

A

The dry mass of an organism.

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4
Q

What is a Biome?

A

A major ecological community of organisms adapted to a particular climatic or environmental condition over a large geographic area.

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5
Q

What are Biotic Factors?

A

Living elements of an ecosystem, such as plants and animals.

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6
Q

What is a Breed?

A

A stock of animals or plants within a species having a distinctive appearance, typically developed through artificial selection.

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7
Q

What is Bycatch?

A

Fish or other marine animals caught unintentionally during fishing, such as dolphins in tuna nets.

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8
Q

What is Carrying Capacity?

A

The maximum number of organisms an ecosystem can sustainably support.

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9
Q

What is a Carnivore?

A

An animal that feeds primarily or exclusively on animal matter.

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10
Q

What is Co-Evolution?

A

The evolution of two or more species which reciprocally affect each other, such as the relationship between a cheetah and a gazelle.

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11
Q

What is Commensalism?

A

A relationship between two organisms where one benefits, and the other derives neither benefit nor harm.

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12
Q

What is a Community in ecology?

A

A group of organisms of different species interacting in a specific area.

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13
Q

What is a Consumer?

A

An organism that obtains its energy by eating other organisms.

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14
Q

What is Convergent Evolution?

A

The process where organisms not closely related evolve similar traits due to similar lifestyles, such as sharks and dolphins adapting to move through water.

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15
Q

What is Divergent Evolution?

A

The process by which groups from the same common ancestor evolve and accumulate differences, such as Darwin’s finches.

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16
Q

What is a Domain in taxonomy?

A

The highest taxonomic rank in biological classification, above the kingdom level, with three domains: Archaea, Bacteria, and Eukarya.

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17
Q

What is an Ecosystem?

A

A system that includes all living organisms (biotic factors) in an area, along with its physical environment (abiotic factors), functioning together as a unit.

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18
Q

What is Emigration?

A

The movement of organisms leaving their home due to unsuitable habitat conditions.

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19
Q

What is an Enzyme?

A

A protein that catalyzes or speeds up a chemical reaction.

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20
Q

What is Evolution?

A

Biological evolution is the change in species over time through the heritable characteristics of a population.

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21
Q

What is Fecundity?

A

The maximum potential reproductive output of an individual, typically measured by the number of gametes.

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22
Q

What is a Food Chain?

A

A sequence of feeding relationships showing which organisms eat what and the movement of energy through trophic levels.

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23
Q

What is Fragmentation?

A

The process by which large habitats are divided into smaller, isolated patches, also known as habitat fragmentation.

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24
Q

What is a Generalist Species?

A

A species that can thrive in various environmental conditions and eat a wide variety of foods, often adaptable to new or disturbed environments.

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25
What is Genetic Variability?
The amount of genetic diversity within a population, with higher diversity typically resulting in healthier, more robust populations.
26
What is a Herbivore?
An animal that primarily feeds on plants, and in a food chain, herbivores are primary consumers.
27
What is Immigration?
The movement of organisms entering a new population or area.
28
What is Interspecific Competition?
Competition between organisms of different species for a common resource.
29
What is Intraspecific Competition?
Competition between organisms within the same species.
30
What are Life Processes?
The key reactions all living organisms carry out for survival, such as respiration, digestion, and reproduction.
31
What is a Life Table?
A table summarizing birth and death rates for organisms at different stages of their lives.
32
What is Metapopulation?
A regional group of connected populations of a species, including patches of suitable habitat that may occasionally contain individuals.
33
What is Mortality?
The death rate within a population.
34
What is Natality?
The birth rate within a population.
35
What does the ecological niche of an organism refer to?
The ecological niche describes the role an organism plays in a community, including the physical conditions it requires and its interactions with other species.
36
What is an omnivore?
An omnivore is an organism that eats both plants and animals.
37
Define parasitism.
Parasitism is a relationship where one organism (the parasite) benefits at the expense of another organism (the host).
38
What is parasitoidism?
Parasitoidism is when an organism lives in close association with its host, eventually killing it.
39
What does phenology study?
Phenology is the study of seasonal changes in plants and animals, like flowering, insect emergence, and bird migration.
40
What is photosynthesis?
Photosynthesis is the process by which plants make glucose and oxygen from carbon dioxide and water using light energy.
41
Define population density.
Population density is the number of individuals of the same species per unit area or volume.
42
What is a primary consumer?
A primary consumer is an organism that eats producers, typically herbivores.
43
What are r-strategists?
R-strategists are organisms that live in unstable environments, have high reproductive rates, and are controlled by abiotic, density-independent factors.
44
What are K-strategists?
K-strategists are organisms that live in stable environments, have slow reproductive rates, and are controlled by density-dependent factors.
45
What is the definition of a race in biological terms?
A race is a geographically isolated breeding population of a species with certain physical characteristics in higher frequencies than other populations of the same species.
46
What is aerobic respiration?
Aerobic respiration is the chemical change in cells that uses glucose and oxygen to release energy, producing carbon dioxide as a by-product.
47
What is anaerobic respiration?
Anaerobic respiration is the release of energy in cells without the use of oxygen, producing a smaller amount of energy compared to aerobic respiration.
48
What is a secondary consumer?
A secondary consumer is an organism that eats primary consumers.
49
What is sexual selection?
Sexual selection is a form of natural selection where individuals of one sex prefer certain characteristics in individuals of the other sex, influencing mate choice.
50
What is a specialist species?
A specialist species can thrive only in a narrow range of environmental conditions and has a limited diet.
51
What is speciation?
Speciation is the formation of new biological species through the process of evolution
52
What is ecological succession?
Ecological succession is the gradual process by which plant communities change and develop over time, leading to new communities.
53
What are the two main types of ecological succession?
The two main types of ecological succession are primary succession and secondary succession.
54
What is a Type I survivorship curve?
: A Type I survivorship curve shows low mortality in early life and a rapid decline in late life, typical of humans.
55
What is a Type II survivorship curve?
A Type II survivorship curve shows a constant death rate throughout an organism's life, typical of many birds.
56
What is a Type III survivorship curve?
A Type III survivorship curve shows high mortality in early life, but those that survive live much longer, typical of small mammals and fish.
57
What is mutualism?
Mutualism is a symbiotic relationship where both organisms benefit from the interaction.
58
What does taxonomy refer to?
axonomy is the classification of living organisms into categories based on shared characteristics.
59
What are trophic levels?
Trophic levels represent the position an organism occupies in a food web, such as primary producers, primary consumers, secondary consumers, etc.
60
What is urea?
Urea is a nitrogenous waste product formed from the breakdown of proteins, excreted in urine.