Book 1

Question 1

Habitat

Answer 1

The place where an organism lives. The non-living part of the environment

Question 2

Population

Answer 2

Group of one species in an ecosystem

Question 3

Community

Answer 3

All the plants, animals and micro- organisms that live together in an ecosystem

Question 4

Ecosystem

Answer 4

Is a natural biological unit which is made up of living and non-living parts

Question 5

Biodiversity

Answer 5

Total variation that exists amongst all living things on earth, (number) and variety of living organisms that inhabit the earth

Question 6

Maintaining biodiversity is important to humans because:

Answer 6

Foods, raw materials and medicines are all only developed from existing ones so we need to keep the biodiversity high

Question 7

Biotic

Answer 7

Living things in the ecosystem that can affect the survival of a organism. Example is disease

Question 8

Abiotic

Answer 8

Not alive (never alive). Abiotic factors are the features of the habitat. Example air temperature

Question 9

Niche

Answer 9

A niche is the role that an organism plays within a community.

Question 10

Producer

Answer 10

An organism that makes its own food

Question 11

Consumer

Answer 11

An organisms that has to eat a other organism for food. Consumer cannot photosynthesise

Question 12

Carnivore

Answer 12

An animal that only eats meat

Question 13

Herbivore

Answer 13

An animal that only eats plants

Question 14

Omnivore

Answer 14

An animal that eats both plants and animal

Question 15

Species

Answer 15

A population of organism sleep that interbreed and produce fertile offspring

Question 16

What are the two types of pyramids

Answer 16

Pyramid of numbers and pyramid of energy

Question 17

Interspecific competition

Answer 17

Competition between two organism of a different species

Question 18

Intraspecific competition

Answer 18

Competition between two of the same species

Question 19

Which of the competitions is more intense?

Answer 19

Intraspecific because organisms of the same species require the same resources

Question 20

What is nitrogen atoms used for?

Answer 20

Nitrogen atoms are needed to make protein (amino acids) and DNA molecules

Question 21

What are examples of biotic factors

Answer 21

Disease
Food availability 
Competition 
Grazing
Predation

Question 22

What are examples of abiotic factors?

Answer 22

Light intensity
pH
Soil moisture
Temperature

Question 23

Alleles

Answer 23

Different forms of the same gene. New alleles arise by mutation.

Question 24

Adaptation

Answer 24

A feature of a organism that lets it survive in an ecosystem.

Question 25

Isolation

Answer 25

The separations of a population into populations that cannot interbreed.

Question 26

Selection pressures

Answer 26

A factor that affects the population causing the death of many

Question 27

Natural selection

Answer 27

The survival of the fittest. Organism best suited to survival, breed and pass on their genes to the next generation

Question 28

Speciation

Answer 28

The evolution of two or more species from one original species

Question 29

Mutations

Answer 29

Change to the genetic material. Mutations can be neutral, advantageous or disadvantageous