Unit 2 Mixed Bunch

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How do large organisms enable efficient gas exchange?
Through specialised exchange organs and flat shape/surface.
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Countercurrent flow?
Water flows over in the opposite direction to blood. Water freshly loaded with oxygen meets blood almost completely saturated with oxygen. The water with little oxygen meets blood with little or no oxygen so a constant diffusion gradient is maintain
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What is taxonomy?
The biological principle of classification of species.
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A heirachy?
Groups within groups with no overlap between groups.
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What property of DNA allows it to be hybridised?
When heated the double strand separates, and when cooled the complementary bases recombine to form the original strand. With enough time all the DNA strands in a mixture will pair up .
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Semi-conservative replication?
DNA helicase breaks the hydrogen bonds and the helix unzips. Free floating nucleotides join to the exposed bases which as templates. Joined together by DNA polymerase. Each new molecule has one new and parent strand.
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Other cards in this set

Card 2

Front

Countercurrent flow?

Back

Water flows over in the opposite direction to blood. Water freshly loaded with oxygen meets blood almost completely saturated with oxygen. The water with little oxygen meets blood with little or no oxygen so a constant diffusion gradient is maintain

Card 3

Front

What is taxonomy?

Back

Preview of the front of card 3

Card 4

Front

A heirachy?

Back

Preview of the front of card 4

Card 5

Front

What property of DNA allows it to be hybridised?

Back

Preview of the front of card 5
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