Which of the following is a sterol-like lipid associated with plant cell membranes?

A) stearate
B) phytosterol
C) linoleate
D) palmitate
E) hopanoids


Answer: B

Biology & Microbiology

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Which of the following are possible reasons for the high level of angiosperm diversity?

A. Animal pollinators will often find rare individuals, facilitating reproduction. B. Wind dispersal favors rare species, whereas insects are able to find common species.

Biology & Microbiology

What might be an advantage to using an individual's own stem cells instead of pancreatic cell allografts to treat type I diabetes?

A. Stem cells can disable the immune responses that led to the diabetes state in the first place. B. This process should be far cheaper than the surgical intervention needed for the allograft. C. You can't do this-stem cell research it is still theoretical, not approved by the FDA, and is currently illegal in the United States. As such, there is no advantage. D. If you were able to use a person's own cells, it would be considered an autograft rather than an allograft. As such, there should be no HLA/MHC matching required, and no long-term anti-rejection drugs needed.

Biology & Microbiology

This figure describes a typical example of ____

a. biotic potential growth b. exponential growth c. logistic growth d. logarithmic growth e. density-dependent growth

Biology & Microbiology

When two species of meadowlarks with different mating songs are considered, which type of reproductive barrier is involved?

a. gametic b. temporal c. behavioral d. habitat e. mechanical

Biology & Microbiology