Most short-period comets do not have randomly oriented orbits because
a. they are affected by the Sun's gravity.
b. they are affected by the solar wind.
c. they formed in the Kuiper Belt, a belt-shaped region in the plane of the solar system.
d. their orbits are altered by the drag of their tails in the solar wind.
e. they all were originally objects ejected from the asteroid belt.
c
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What cycle includes movement of a nutrient from rocks and sediments, waters, and/or atmosphere into and out of food webs?
a. sedimentary b. nitrogen c. water d. biogeochemical e. carbon
This figure, and specifically the area with the question mark, depicts which concept?
1.The sea breeze
2.The land breeze
3.The rain shadow
4.The El Niño
Which of the following is NOT an end product of glycolysis?
a. total of 4 ATP produced b. net yield of 2 ATP c. 2 pyruvate molecules d. carbon dioxide e. production of a pair of three carbon molecules
Suppose there is (hypothetical) evidence that a gene in mice produces a substance that induces twitchiness in hind leg muscles. A female mouse of a true-breeding twitchy strain is mated with a male of a true-breeding non-twitchy strain
All progeny are twitchy. Which of these procedures would you use to provide evidence for your hypothesis that twitchiness is due to mtDNA? A) Sequence the mtDNA of the twitchy mother. B) Breed twitchy male progeny with normal females to show no paternal inheritance. C) Breed twitchy female with twitchy male F1 mice to verify there is maternal inheritance. D) Backcross twitchy female offspring with normal fathers. E) Sequence the mtDNA of the twitchy male offspring.