How do ray-finned fish keep from sinking?
a. they are constantly swimming
b. their fins are constantly moving
c. they have lungs that are always filled with air
d. they have a swim bladder that is filled with gas
e. they have a skeleton that is less dense than the surrounding water
ANSWER: d
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The production of cholera toxin by virulent strains of Vibrio cholera is dependent upon genes in a bacteriophage. This is an example of
A. bacterial transformation. B. induction. C. transduction. D. lysogenic conversion.
If red coat is homozygous dominant in horses
and white coat is homozygous recessive, in a cross between a homozygous dominant redcoated horse and a white-coated horse, what would the result be in the offspring?
a. all homozygous recessive b. all homozygous dominant c. half homozygous dominant and half homozygous recessive d. all heterozygous e. half heterozygous and half homozygous dominant
Where does glycolysis takes place?
A. mitochondrial matrix B. mitochondrial intermembrane space C. mitochondrial inner membrane D. mitochondrial membrane E. cytosol
Which of the following is the best answer for why plants require nitrogen?
A. to make membranes B. to make cell walls C. to make chlorophyll D. to make amino acids and nucleotides