In a centrifuged blood sample, which layer contains the red blood cells?
1.Hematocrit
2.Leukocytes
3.Plasma
4.Platelets
1
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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
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).
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.
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.