The letter “D” in the above figure represents
a. the root nodules.
b. the primary root.
c. the primary leaf.
d. the cotyledons.
e. none of these.
Answer: a
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A glycosidic linkage is analogous to which of the following in proteins?
A) an amino group B) a peptide bond C) a disulfide bond D) a ?-pleated sheet
Imagine that a deep temperate zone lake did not turn over during the spring and fall seasons. Based on the physical and biological properties of limnetic ecosystems, what would be the difference from normal seasonal turnover?
A) The lake would be uniformly cold during the winter and summer. B) The lake would fail to freeze over in winter. C) An algal bloom of algae would result every spring. D) Lakes would suffer a nutrient depletion in surface layers. E) The pH of the lake would become increasingly alkaline.
Which combination makes the most sense from an evolutionary perspective?
a. light skin and vitamin D deficiency b. light skin and extensive exposure to sun c. dark skin and little exposure to sun d. dark skin and folate deficiency e. light skin and little sun, or dark skin and lots of sun
During cell division, it is essential that the genetic material be distributed equally to the two daughter cells. This is accomplished through the participation of which one of the following organelles?
A) centrioles B) ribosomes C) peroxisomes D) Golgi apparatus E) nucleolus