Among explanations for tropical diversity, why does the discussion focus heavily on factors that might be responsible for diversity in tropical plant communities?
A) Most tropical biologists study plants, not animals.
B) Animals play insignificant roles in tropical ecosystems.
C) The diversity of animals is linked closely to the diversity of plants, so an understanding of plant diversity helps us to understand the diversity of animals as well.
D) Flowering plants dominate most tropical ecosystems, and flowering plants have been on earth much longer than animals.
Ans: C) The diversity of animals is linked closely to the diversity of plants, so an understanding of plant diversity helps us to understand the diversity of animals as well.
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A bundle of muscle cells is called a(n) ________
Fill in the blank(s) with correct word
Each of the following is an activity of RAD51 or the DNA with which it interacts except
A) RAD51 appears in cells at the time of recombination. B) RAD51 coats single-stranded DNA. C) RAD51-coated DNA interacts with double-stranded DNA. D) RAD51-coated DNA moves along target DNA until it finds a complementary sequence. E) All are RAD51 or RAD51-DNA activities.
The same basic array of bones is modified to give rise to the wing of a bat and the fin of a porpoise. Such anatomical structures are called:
A. inherited. B. homologous. C. analogous. D. uniform. E. evolutionary modifications.
Jaws and paired fins evolved in early __________. Fill in the blank(s) with the appropriate word(s)