During the transition from interphase to metaphase chromosome, the DNA undergoes how much compaction?
A) 2 fold B) 500 fold C) 10 fold D) 5000 fold E) 50 fold
Answer: D
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Which of the following molecules are biologically active?
A. L – sugars B. L – amino acids C. only amino acids that are optically inactive D. only sugars that lack chiral centers E. All of these molecules are biologically active.
Ultimately, the signal from a peptide hormone is typically conveyed to the effectors in the cell via the transfer of what molecular moiety?
A. nucleotide B. NO (nitric oxide) C. H2O D. phosphate group E. amino acid Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about peptide receptors? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
A planula is a
a. sedentary, attached, tree-shaped form found in corals. b. swimming larval form with an outer ciliated epidermis. c. kind of parasitic worm. d. fleshy lobe that extends laterally from the body wall of a marine worm. e. rasplike tongue.
Exceptionally large babies increase a mother's mortality risk when giving birth and exceptionally small babies tend to die at birth or shortly afterward. For these reasons, birthweight in human babies is generally:
a) not a heritable trait. b) subject to disruptive selection. c) subject to stabilizing selection. d) under even stronger selection today than it was before the development of Caeserian delivery. e) All of the above.