Which group of tiny marine organisms have the simplest body and smallest genome of all modern animals?
a. sponges
b. choanoflagellates
c. placozoans
d. cnidarians
e. flatworms
c
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Enzymes change the ___________ of a reaction
A. G B. first law of thermodynamics C. second law of thermodynamics D. types of products E. activation energy
The two nitrogen atoms in nitrogen gas (N2 ) share six electrons forming a _____.
A. hydrogen bond B. double bond C. single covalent bond D. double covalent bond E. triple covalent bond
A good cloning vector:
A. should have a gene or genes that allows for selection of transformed host cells. B. should not be able to be cut by more than one restriction enzyme. C. should be readily degraded in the host. D. should not be capable of replication. E. should be large.
One of the first set of experiments to refute spontaneous generation was done in 1688 by Francesco Redi. Which of the following statements regarding Francesco Redi's experiments is true?
a. His experiments determined a series of conditions that must be satisfied in determining the causative agent of disease. b. The results of his experiment demonstrated that living organisms are derived from other living organisms. c. His experiments demonstrated that oxygen is essential to all life. d. He determined that material from an infectious agent taken from one person could be used to stimulate immunity in another person.