Deuterostomia is a ____ lineage of animals that dates to the ____

a. polyphyletic; Mesozoic
b. paraphyletic; Cenozoic
c. monophyletic; Paleozoic
d. paraphyletic; Paleozoic
e. polyphyletic; Cenozoic


ANSWER: c

Biology & Microbiology

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Why is it useful to know the structure of a ribozyme when trying to understand a particular ribozyme's

function?

a. The way the RNA folds determines the activity of the ribozyme. We need to understand the structure in order to measure the rate of the reaction. b. It is not very useful at all; it is just a matter of curiosity. c. We need to know the structure in order to develop drugs that destroy that structure and prevent HIV infection. d. We need to be able to determine if an RNA molecule is a ribozyme or not. The only way to do that is to determine the structure. e. The way the RNA folds relates to the function of the ribozyme. If we can figure out the relationship, we might be able to develop new ribozymes that act as therapeutic agents.

Biology & Microbiology

What is the inner coat of the seed called?

a. tegmen b. radicle c. testa d. epicotyl

Biology & Microbiology

The ________ gland stores and releases hormones produced by the hypothalamus

a. anterior pituitary b. pineal c. posterior pituitary d. thyroid e. parathyroid

Biology & Microbiology

________ refers to random changes in allele frequency as a result of chance events

Fill in the blank(s) with correct word

Biology & Microbiology