How does aquatic life survive freezing temperatures?
Correct answer: B. In water bodies, the top layer freezes, forming an insulating layer, allowing aquatic life to survive beneath it.
- A. Aquatic organisms produce antifreeze proteins that prevent their bodies from freezing.
- B. In water bodies, the top layer freezes, forming an insulating layer, allowing aquatic life to survive beneath it.
- C. Aquatic life migrates to warmer parts of the water body to escape freezing temperatures.
- D. They perish in winter but leave behind resilient eggs to hatch in spring.
Explanation
The correct answer is that only the top layer of a water body freezes, creating an insulating barrier that keeps the water below from freezing. This allows aquatic life to survive in the liquid water beneath the ice. The ice acts as a protective layer, trapping heat and maintaining a stable environment for organisms. Additionally, oxygen is trapped beneath the ice, allowing fish and other aquatic life to breathe. The other options are incorrect because: - Antifreeze proteins are not the primary survival method for most aquatic life. - Migration to warmer parts of a water body is not a typical behavior for aquatic organisms in response to freezing temperatures. - While some species lay eggs that survive winter conditions, most aquatic organisms do not rely on this strategy for population survival.
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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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