Which statement(s) about the rII- strain of T4 bacteriophage that Benzer studied is (are) true? (Select all that apply.)
A) It grows in E. coli B, but not in E. coli K(?).
B) It produces larger plaques than wild-type.
C) It grows in E. coli K(?), but not in E. coli B.
D) It produces smaller plaques than wild-type.
A) It grows in E. coli B, but not in E. coli K(?).
B) It produces larger plaques than wild-type.
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One type of weak chemical interaction occurs when two molecules having partial electrical charges of opposite polarity form an intermolecular attraction. These interactions are called:
A. ionic bonds. B. hydrogen bonds. C. hydrophobic interactions. D. van der Waals interactions. E. covalent bonds.
Archaeopteryx lithograpica:
A. was the first fossil directly linking birds to reptiles B. had a beak with teeth C. had a small, reptilian breastbone D. had both claws and feathers on the wings E. All of the choices provided are true
How old is our planet Earth?
A. 3.5 billion years old B. 4.6 thousand years old C. 4.6 million years old D. 4.6 billion years old
An important food source for baleen whales are:
a. shrimp. b. krill. c. lobsters. d. crabs. e. horseshoe crabs.