In a centrifuged blood sample, which layer contains the red blood cells?

1.Hematocrit
2.Leukocytes
3.Plasma
4.Platelets
1

Biology & Microbiology

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Complete the following sentence. An exon is _______________________

A. a protein that is clipped out post- translationally B. RNA that is removed during the processing of an RNA molecule and remains inside the nucleus C. part of an intact, mature mRNA that leaves the nucleus D. a transfer RNA that binds to the codon E. a series of amino acids at the end of a new polypeptide that directs transcription to the ER

Biology & Microbiology

The chorion and __________ become part of the

placenta, the organ that allows exchange of substances between maternal and fetal bloodstreams. Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

By evaluating and selecting mates with superior qualities, an animal can increase its

A. foraging efficiency. B. competitive strategies. C. learning. D. length of life. E. reproductive success.

Biology & Microbiology

A new industrial park in your community dumps its wastewater into a large aerated pond, to which nutrients are added. The water from this pond makes its way into a nearby marsh, which eventually drains into a slow-moving stream. This is an example of

A) artificial bioremediation. B) natural bioremediation. C) bioreporter use. D) natural fermentation. E) a method to make potable water.

Biology & Microbiology