During prevention of polyspermy in sea urchin the shift from ___1___ to __2____is the result of a small influx of Na+ into the egg through newly opened sodium channels. Sperm cannot fuse with egg cell membranes that have a ___3___ resting potential, so the shift means that no more sperm can fuse to the egg.

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#Question id: 10952

#Unit 7. System Physiology – Animal

Which of the following blood units carries the least risks for inducing an immediate transfusion reaction into a B+ (B, rhesus positive) recipient?

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#Question id: 4178

#Unit 3. Fundamental Processes

The acceptor stem of tRNA consists of the __.

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#Question id: 5690

#Unit 8. Inheritance Biology

Species I is diploid (2n =4) with chromosomes AABB; related species II is diploid (2n = 6) with chromosomes MMNNOO .Which of the following chromosome  in allotriploid individuals?

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#Question id: 2271

#Unit 2. Cellular Organization

Depolymerization of microtubules is inhibited by

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#Question id: 12675

#Unit 10. Ecological Principles

Use the incomplete diagram below, illustrating some of the steps involved in eutrophication to answer the following questions

What would be a likely entry for box A?