Which of the following evidence most strongly supports the common origin of all life on Earth? All organisms ________.

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#Question id: 790

#Unit 1. Molecules and their Interaction Relevant to Biology

Presence of a series of 3 G-C pairs in the anticodon arm of initiator fmet tRNA is essential for

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#Question id: 15285

#Unit 5. Developmental Biology

The range of a paracrine factor (and thus the shape of its morphogen gradient) not depends on:

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#Question id: 400

#Unit 1. Molecules and their Interaction Relevant to Biology

Consider two solutions: solution X has a pH of 4; solution Y has a pH of 7. From this information, we can reasonably conclude that ________.

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#Question id: 20021

#Unit 12. Applied Biology

Which one of the following can send electrical impulses into the body to reduce pain?

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#Question id: 12544

#Unit 10. Ecological Principles

Use Figure to answer the following questions. Examine this food web for a particular terrestrial ecosystem. Each letter is a species. The arrows represent energy flow.

A toxic pollutant would probably reach its highest concentration in which species?