In chordates, which mesoderm structure forms during gastrulation and provides structural rigidity along the dorsal anterioposterior axis of the embryo?
A. Archenteron
B. Neural tube
C. Notochord
D. Epidermis
E. Intestinal tract
C. Notochord
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As a population approaches its carrying capacity, how does its growth change? Use Figure 46.5 in your text if you need help
A. The growth rate slows until N is 0. B. The growth rate slows until N is close to K. C. The growth rate slows until N is close to r. D. The growth rate stays the same. E. r changes until it is close to K.
Some chaparral plants have ____ seeds that only sprout after being exposed to fire
a. inedible b. fire-resistant c. aromatic d. flammable e. drought-resistant.
Bacteria in the intestinal tract prevent
pathogens from causing disease by a. crowding them out. b. eating other bacteria. c. producing protein traps to kill them. d. submerging them in acid in the stomach. e. doing all of these.
____________ are microorganism that are not included in phylogenetic trees because they are acellular.
Fill in the blank(s) with the appropriate word(s).