Cells migrate from one place to another during gastrulation using

A) cilia.
B) cellular protrusions.
C) flagella.


Answer: B

Biology & Microbiology

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Sea urchins living in the rocky intertidal zone use the following method to overcome wave shock:

a. creating burrows in which they live. b. having a low profile. c. using spines to dissipate the energy of the wave. d. all of the above

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A person with sickle-cell trait has ________ at the ?-globin locus

A) two wild-type alleles B) two mutant alleles C) one wild-type and one mutant allele D) one wild-type and one deleted allele E) one mutant and one deleted allele

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All of the following are functions of the cell membrane EXCEPT:a

transmitting signals. b. participating in energy transfer. c. being freely permeable to all substances. d. regulating the passage of materials. e. participating in chemical reactions.

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