Biodiversity 2 | S2 Science Revision

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1 pts.

The diagram below shows a food chain. What do the arrows in the diagram represent?

flow of energy

life cycle stages

one community replacing another

what an animal eats

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1 pts.

Using the key, bird B is correctly identified as

a cormorant

a duck

an eagle

a jacana

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1 pts.

The diagram shows a pyramid of biomass. Which of these best describes a relationship shown by this African pyramid of biomass?

The lion is a predator of the giraffes.

The lion is the prey of the giraffes.

Giraffes are the prey of the trees.

Giraffes are predators of the lion.

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. 1 pts.	Which of the organisms in a forest ecosystem is an example of a producer?
	A.	squirrels
	B.	oak trees
	C.	black bear
	D.	bacteria
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1 pts.

Botanists often use leaves to identify plants. Which trait of the leaves shown would be most useful in identifying the plants they came from?

Colour of the leaf

Function of the leaf

Arrangement of leaves on a stem

Presence or absence of veins

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1 pts.

In a food chain, the numbers of each type of population are usually in a relatively stable combination. A diagram of a food chain is shown above. If humans interfered by spraying an insecticide to kill the insects, what would be the next thing that would happen?

The number of hawks would increase

The number of small songbirds would decrease

The number of grass plants would decrease

The number of snakes would increase

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1 pts.

Crickets chirp to attract other crickets. The temperatures and rates of their chirping are graphed above. Which statement below is most likely true for the data represented in the graph?

The cooler the temperature, the louder the crickets chirp.

The crickets cannot chirp at temperatures lower than 10C

The warmer the temperature, the more often crickets chirp.

The temperature and the chirping of crickets are not related

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. 1 pts.	Which of these could cause a decrease in the number of squirrels in a population?
	A.	An increase in cooperation with birds in the area
	B.	An increase in the squirrels’ territory
	C.	An increase in competition with other nut-eating animals
	D.	An increase in the squirrels’ food supply
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1 pts.

Scientists have spent many years studying the peppered moth, which is a species that has adapted its color from light to dark in reaction to environmental pollution. Which of the following line graphs represents the data from the table?

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1 pts.

The picture above illustrates the habitat of a population of animals and its distance from the nearest water source. How far does an animal have to travel to obtain water?