Which of the following elements is required for the enzymatic reaction that produces phosphoenolpyruvate?

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#Question id: 19071

#Unit 4. Cell Communication and Cell Signaling

Pathogen effect on host, response is suppressive is called___

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#Question id: 14086

#Unit 1. Molecules and their Interaction Relevant to Biology

The proportion of Major groove in A-DNA is 

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#Question id: 6998

#Unit 5. Developmental Biology

Which of the following is an adult organism that has fewer than 1,000 cells?

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#Question id: 1417

#Unit 4. Cell Communication and Cell Signaling

Which of the following triggers apoptosis?

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#Question id: 9608

#Unit 9. Diversity of Life Forms

Darwin analogized the effects of evolution as the above-ground portion of a many-branched tree, with extant species being the tips of the twigs. The common ancestor of two species is most analogous to which anatomical tree part?