It took more than 100,000 years for the human
population to grow to one billion individuals and
took about __________ years to add five billion
more.
a. 200
b. 20,000
c. 100,000
d. 200,000
e. 500,000
Answer: a
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A mutant of Rhizobium leguminosarum is able to survive and reproduce in the laboratory outside of plant roots, but can no longer initiate root nodule formation. What type of genes are most likely mutated in this mutant?
A) rhz genes B) myc genes C) nif genes D) nod genes
Which feature do Bryozoans possess than brachiopods lack?
A. a lophophore. B. a true coelom. C. an exoskeleton. D. a shell.
Blood pressure is measured with a(n) ________ and a stethoscope
Fill in the blank(s) with correct word
If you had a black male guinea pig and brown female guinea pig, but you didn't know which was the dominant characteristic, how would you find out the dominant color, assuming the dominant characteristic is homozygous,?
a) Mate them, and then mate their offspring to see what color the next generation is—that will be the dominant color. b) Mate them and see what color the offspring are—that will be the dominant color. c) Mate them together, and then mate their offspring to see what color the next generation is—the other color will be the dominant color. d) Mate them and see what color the offspring are—the other will be the dominant color. e) The dominant color could not be determined by mating the two, and then mating their offspring; further generations would have to be produced to determine the dominant color.