Biologists cannot possibly study all living species. Instead, they try to understand cell behavior by studying a select subset of them
Which of the following characteristics are useful in an organism chosen for use as a model in laboratory studies?
(a) amenability to genetic manipulation
(b) ability to grow under controlled conditions
(c) rapid rate of reproduction
(d) all of the above
(d)
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The only known "solution" to the loss of efficiency caused by rubisco-oxygenating RuBP is to raise the concentration of CO2 at the enzyme, using ATP generated by the thylakoid. Which of the following is likely most correct of such plants?
A. They are tolerant of shade. B. They require bright, sunny habitats. C. They do not produce O2. D. They do not produce reactive O2 species. E. They require high CO2 levels.
The increased osmolarity of the filtrate after Bowman's capsule is caused by:
A. diffusion of NaCl out of the proximal tubule. B. diffusion of HCO3– out of the proximal tubule. C. active transport of NaCl out of the proximal tubule. D. active transport of HCO3– out of the proximal tubule.
Conifer sporophytes are longer-lived, and anatomically and morphologically more complex than other gymnosperms
a. True b. False
The large ribosomal subunit joins the initiation complex to begin ________ during translation.
A) association B) initiation C) elongation D) termination