Most meteors come from comets, but most meteorites come from asteroids. Explain this statement
What will be an ideal response?
The physical characteristics of meteorites provide evidence that they are fragments of parent bodies in the asteroid belt. The meteoroids in a meteor shower are understood to be dust and debris released from the icy nucleus of a comet.
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If genetic contribution to variation in a trait is negligible:
A. identical twins will be more similar to one another than fraternal twins are to one another. B. fraternal twins will be more similar to one another than identical twins are to one another. C. identical twins will be no more similar to one another than are fraternal twins. D. identical twins will be no more similar to one another than each is to any other sibling. E. None of these choices is correct.
Much of the coast of the Indonesian island of Sumatra was devastated by the 2004 tsunami. The recovery of forests in that area is an example of
A. secondary succession. B. facilitation. C. the diversity-stability hypothesis. D. primary succession. E. island biogeography.
Which of the following genotypes is homozygous?
a. AaBB b. aABB c. aaBB d. aaBb e. AaBb
Asexual reproduction in flowering plants does not usually involve the formation of:
a. plantlets, stolons, or seeds. b. suckers, corms, or rhizomes. c. flowers, seeds, or fruits. d. bulbs, rhizomes, or seeds. e. flowers, bulbs, or stolons.