Biology 1B - Environment and Evolution - Flashcards in GCSE Biology

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Created by: T1LEY
Created on: 29-11-15 12:56

Explain why animals that use sweating to keep cool can't survive well in deserts.

Because they lose too much water, and water is scarce in the desert.

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What is natural selection?

The process whereby organisms better adapted to their environment tend to survive and produce more offspring.

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What are indicator species?

Species that are sensitive to slight changes in their environment.

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Give one advantage of producing growth hormone with bacteria, rather than by other methods.

-Bacteria produce quickly, eyc.

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How do the spines on a cactus help it to survive?

The leaves are curled into spines to reduce the surface area so less water vapour from the leaves are lost.

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What would happen if two species in the same habitat need the same resource?

They would compete for it.

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What type of living organism is a good indicator of the concentration of sulphur dioxide in the air?

Lichens

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Name four elements that living organisms contain.

Carbon, hydrogen, oxygen and nitrogen.

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In the 1850s, the industrial revolution began - there was rapid growth in heavy industries in Britain. Why do you think the number of dark moths increased after this time?

As the industry increased, the trees became darkened with soot. Now the dark moths were better camouflaged, so they increased in number.

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Describe how tissue culture works.

A few plant cells are put into a growth medium with hormones and they grow into new plants/clones of the parent plant.

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Two reasons why people are concerned about GM crops.

Might not be safe to eat. Transplanted genes may get out into the natural environment.

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Other cards in this set

Card 2

Front

What is natural selection?

Back

The process whereby organisms better adapted to their environment tend to survive and produce more offspring.

Card 3

Front

What are indicator species?

Back

Card 4

Front

Give one advantage of producing growth hormone with bacteria, rather than by other methods.

Back

Card 5

Front

How do the spines on a cactus help it to survive?

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Biology 1B - Environment and Evolution