The first plants to produce seeds evolved during which time period?
a. Mesozoic era
b. Cenozoic era
c. Jurassic period
d. Devonian period
e. Cretaceous period
d
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Most archaeal mRNAs like those of eukaryotes are spliced.
Answer the following statement true (T) or false (F)
Which of the following would not be an example of structure determining function?
A. the highly branched trachea of insects B. the electrical connections between cardiac muscle cells C. the tight packing of epithelial cells on top of the basal lamina D. the brush border of the small intestine E. All of these choices are examples of structure determining function.
The three most common shapes of prokaryotes are
A. cubical, spherical, and rod-shaped. B. rod-shaped, star-shaped, and cubical. C. spherical, spiral, and thread-like. D. star-shaped, cubical, and spherical. E. spherical, rod-shaped, and spiral.
Following are the structures of three fatty acids: palmitic acid, stearic acid, and oleic acid. What combination of these fatty acids could you use to make a fat that is liquid at room temperature?
A) one palmitic acid, one stearic acid, and one oleic acid
B) three palmitic acids
C) two palmitic acids and one stearic acid
D) one stearic acid, one oleic acid, and one phosphate group