Hardening of the arteries is also known as
a. atherosclerosis.
b. apoptosis.
c. abuildosis.
d. keritosis.
e. all of these.
Answer: a
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Knowledge of silencing genes provided scientists with clues to the expression of what characteristic in flowers such as petunia?
A. number of flower parts B. placement of flower parts C. color expression D. vitamin deficiencies E. time of flowering
Which of the following is true about glycosylated plasma membrane proteins?
A) Carbohydrate is added only after the protein is in the plasma membrane. B) The carbohydrate usually is one sugar and rarely more than 5 sugars long. C) Only one specific site is glycosylated on each protein. D) N-linked carbohydrates are linked to hydroxyl groups in protein R groups. E) The carbohydrates can be detected experimentally with ferretin-linked lectins.
In the section "Investigating Life: Birds Do, Bees Do It", bumblebees pollinated M. lewisii, whereas hummingbirds preferred the red-flowered M. cardinalis. If a hummingbird carries M. cardinalis pollen to M. lewisii, the resulting hybrid offspring are viable. M. lewisii and M. cardinalis are different species because of
A. post-zygotic barriers to reproduction. B. pre-zygotic barriers to reproduction. C. punctuated equilibrium. D. gradualism. E. asexual reproduction.
Relative to the mRNA, what move(s) during translocation?
a. attached tRNAs and the polypeptide chain b. attached tRNAs and the ribosome c. the ribosome and the polypeptide chain d. the ribosome only