The following sequence of organisms is not an accurate representation of a community in that frogs could actually feed upon insects or spiders, fish could feed on either frogs or insects, and humans enjoy fish, frogs, tree products, and, in some cases, even insects. A more complete representation of these interactions would be a(n) trees ® insects ® spiders ® frogs ® fish ® human
A. energy pyramid.
B. food chain.
C. biome schematic.
D. food web.
D. food web.
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Amed has scaly skin due to the X-linked recessive condition icthyosis. He is ________ for the trait.
A) autosomal dominant B) heterozygous C) homozygous D) hemizygous
Which pairing of nerves and functions is part of the peripheral nervous system?
a. somatic nerves; flight-fight response b. autonomic nerves; control skeletal muscle c. autonomic nerves; control internal organs d. parasympathetic neurons; prepare body for danger e. sympathetic neurons; housekeeping tasks in the body
Select all of the following that are true of the intrinsic rate of population growth.
A. It is not often seen in nature. B. It is the rate of population growth once a population reaches its carrying capacity. C. It is the rate of population growth under optimal conditions. D. It is seen when populations are in equilibrium. E. It is most commonly seen in new, expanding populations.
Nitrogen has 7 electrons and can form a maximum of ________ bonds with other elements.
A. 1 B. 5 C. 2 D. 3 E. 4