An allopolyploid is
a. a polyploid that arose from a hybrid individual.
b. a species that arose parapatrically.
c. an allopatrically arising species.
d. a polyploid arising from a single diploid individual.
e. any sympatrically arising species.
A
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Which of the germ layers gives rise to most of the internal organ systems?
a. mesoderm b. ectoderm c. endoderm d. both the mesoderm and ectoderm
Guard cells
a. surround the stoma. b. control the flow of gases between the interior of a leaf and the atmosphere. c. become turgid when it becomes light if environmental conditions are not too hot or too dry. d. may absorb water from surrounding epidermal cells. e. do all of these.
Leptin is a hormone released by:
a. adipose tissue. b. the stomach. c. the large intestine. d. chylomicrons. e. the liver
To which section does the following excerpt most likely belong? "13 transects were run. Groups were observed at a distance for 30-60 m while the individuals were identified. A 300 m transect was then run along the previously observed line of feeding hippos"
A. Introduction B. Methods C. Results D. Discussion