Suppose that the DNA of an organism is studied and found to contain 30% adenine. Based on this information, what percentage of thymine would you predict that the DNA of this organism would also contain?
a. 20%
b. 30%
c. 40%
d. 50%
Answer: b. 30%
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Which of the following is true of movement
through the phloem?
a. movement through phloem is through live cells b. movement between sieve tube members is via plasmodesmata c. movement through the phloem is not necessarily up d. the phloem cells through which movement occurs are non-nuclear e. all of these are true about movement through the phloem
On the landmass that became South America
a. monotremes were replaced by marsupials and early placental mammals starting about 65 million years ago. b. highly evolved placental mammals radiated south from North America about 5 million years ago. c. many early placental mammals became extinct in the Pliocene. d. early placental mammals arose between 130 and 85 million years ago. e. all of these occurred.
All of the taxa in a monophyletic group can be called a:
a. division. b. class. c. clade. d. phyla. e. derivative.
Which of the following bacterial cell structures plays an important role in the creation of biofilms?
A) glycocalyces B) flagella C) fimbriae D) pili E) both fimbriae and glycocalyces