Some bacteria exhibit a primitive form of behavior in that they can sense the properties of their environments and use that ability to make adaptive responses. Which of the following are NOT capabilities of any known bacterium?
A. respond to light with the aid of flotation devices
B. respond to other individual bacteria and transmit DNA via conjugation
C. move to other bacteria and aggregate with them in response to chemical signals
D. orientation with respect to the Earth's magnetic field
E. none of the other options presented
Answer: E
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The difference between a nucleotide and a nucleoside is the presence of which of the following?
A. a phosphate group B. a pentose sugar C. a hydroxyl group D. a nitrogenous base E. an amino group
Reduction means
A. the gain of electrons by a molecule. B. the loss of oxygen from a cell. C. the gain of oxygen by a cell. D. the gain of oxygen and an electron. E. the loss of electrons by a molecule.
The membrane that contacts the endometrium
of the uterus is the
a. amnion. b. allantois. c. chorion. d. yolk sac. e. umbilical cord
What was the basic problem with the Miller-
Urey early atmosphere experiments?
a. there was no lightning on the early Earth b. there was no hydrogen gas in Earth’s early atmosphere c. they used oxygen gas which was not present in Earth’s early atmosphere d. the mixture of gases they used was not representative of Earth’s early atmosphere e. more than one of these is correct