Chloe has the scaly skin condition icthyosis, which is X-linked recessive. Which of the following is most likely true?
A) Her mother and father were both unaffected carriers.
B) Her mother was affected and her father was unaffected.
C) Her father was a carrier.
D) Her mother was a carrier and her father was affected.
D) Her mother was a carrier and her father was affected.
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A plot of population size vs time that displays a J-shape is indicative of
A. parasitism. B. exponential growth. C. logistic growth. D. K-selection. E. r-selection.
Bacteriochlorophyll differs from chlorophyll a and b in structure and function. Which of the following statements correctly contrasts these types of chlorophyll?
A) Bacteriochlorophyll has a porphyrin ring, whereas chlorophyll does not. B) Chlorophyll has a phytol side chain, but bacteriochlorophyll does not. C) Chlorophyll has a methyl group attached to the porphyrin ring, whereas bacteriochlorophyll has a formyl group. D) Bacteriochlorophyll has a saturated carbon-carbon bond at one location in the porphyrin ring, whereas chlorophyll does not. E) both choices A and D correctly contrast these types of chlorophyll.
The ________ is the zone near the shore of a lake where a diverse group of organisms lives and where light and nutrients are abundant
A) profundal B) stratification C) phytoplankton D) littoral E) limnetic
Four of the following are associated with mushrooms. Which one is the exception?
A. Gills B. dikaryotic hyphae C. nuclear fusion D. meiosis E. flagellated spores