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Card 6

Front

Which are more closely related - hippos and whales or hippos and cows?

Back

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Card 7

Front

What is the term that describes structures that are similar in structure but have different purposes?

Back

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Card 8

Front

What are three factors that affect the rate of diffusion of substances into cells?

Back

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Card 9

Front

Why do large, multicellular animals need specialised exchange surfaces?

Back

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Card 10

Front

What are three different animal exchange surfaces?

Back

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Card 11

Front

What are three structural features of fish gills that make them efficient for gaseous exchange?

Back

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Card 12

Front

How does the counter-current flow improve the efficiency of oxygen uptake?

Back

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Card 13

Front

How do insects prevent water loss from trachae?

Back

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Card 14

Front

Why does a tracheal system limit the size of insects?

Back

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Card 15

Front

What are two advantages of using a tracheal system for gas exchange?

Back

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