How does aquatic life survive freezing temperatures?
Correct answer: A. In water bodies, only the top layer freezes in winters, allowing aquatic life to survive
- A. In water bodies, only the top layer freezes in winters, allowing aquatic life to survive
- B. They have cold-shock proteins which allow them to survive via hibernating while they are frozen
- C. The aquatic life migrates out before the water bodies freeze
- D. They do not survive but they lay their eggs before winter starts. The off-spring then recreate the population from scratch
Explanation
Only the top layer of a lake or river freezes, underneath the frozen upper layer the water remains in its liquid form and does not freeze. Also, oxygen is trapped beneath the layer of ice. As a result, fish and other aquatic animals find it possible to live comfortably in the frozen lakes and ponds.
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About Scientific Reasoning
Scientific reasoning evaluates hypotheses through observations, variables, controls, measurements and experimental results. Questions involve identifying independent and dependent variables, recognising a fair test, interpreting tables or graphs, distinguishing evidence from opinion, and deciding whether data supports, rejects or leaves a hypothesis unresolved.
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