During a study session about evolution, one of your fellow students remarks, ʺThe giraffe stretched its neck while reaching for higher leaves; its offspring inherited longer necks as a result.ʺ Which statement is most likely to be helpful in correcting this studentʹs misconception?

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#Question id: 1815

#Unit 4. Cell Communication and Cell Signaling

Genuine adaptive T- and B-cell responses are seen in:

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#Question id: 12448

#Unit 10. Ecological Principles

When members of a population move out of a given area, it is called

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#Question id: 9172

#Unit 9. Diversity of Life Forms

Two plant species live in the same biome but on different continents. Although the two species are not at all closely related, they may appear quite similar as a result of ________.

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#Question id: 13186

#Unit 10. Ecological Principles

The following figure is a model of seedling establishment as a function of distance from a parent tree. Initial seed density measures the number of seeds falling to the ground. Seed survivorship measures the proportion of seeds that survive to the adult stage at each distance

This model predicts that recruitment of new individuals into the population should be

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#Question id: 376

#Unit 1. Molecules and their Interaction Relevant to Biology

Phosphoric acid is tribasic, with pKa of 2.14, 6.86 and 12.4. The ionic form that predominates at pH 3.2 is