Why is morphological convergence not a good explanation for vertebrate forelimbs? What will be an ideal response?
Morphological convergence can explain general similarities between features, which while not related,
serve a common function. However, vertebrate forelimbs are extremely similar (bones, nerves,
muscles, blood vessels) and serve a variety of purposes. Thus, they are clearly homologous structures.
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Scientists have found that bluegill sunfish receive the highest energy return from large Daphnia, an intermediate return from medium Daphnia and the smallest return from small Daphnia. If you were to stock aquaria with equal proportions of small, medium, and large Daphnia, but vary the density of Daphnia from very low to very high, how do you think bluegills would react? Check all that apply.
_____ Bluegills would consume a larger proportion of small Daphnia in the very low density aquaria compared with the medium or high density aquaria. _____ Bluegills would consume equal proportions of large Daphnia in all aquaria. _____ In medium density aquaria, bluegills would select medium sized Daphnia over small or large Daphnia. _____ The tendency to select large Daphnia over small or medium Daphnia will increase as the density of Daphnia in the aquaria increases.
In science, a theory is defined as
a. a speculative guess. b. a hypothesis. c. an explanation that is well documented and consistent with the evidence. d. a description of a phenomenon for which there is no explanation. e. a personal conviction.
Life began on Earth approximately ________ years ago
A) 100,000 B) 1 million C) 5 million D) 3.8 billion E) 4.6 billion
How does ATP release energy that can be used by living cells?
A) By being exposed to body heat B) By breaking a bond within an ATP molecule C) By being exposed to sunlight D) By adding more phosphate groups to itself