What does the "mosaic" part of the fluid mosaic model refer to?
a. the membrane cholesterol
b. the membrane functions
c. the membrane proteins
d. the membrane phospholipids
Answer: c. the membrane proteins
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The body of arthropods includes
(a) a head. (b) a thorax. (c) an abdomen. (d) all of the above.
The type of muscle that typically surrounds hollow tubes and organs like the stomach is
A. skeletal muscle. B. smooth muscle. C. striated muscle. D. cardiac muscle. E. voluntary muscle.
The degree of relatedness between a niece and an uncle is ____, and the degree of relatedness between first cousins is
____.
a. 0.75; 0.50 b. 0.50; 0.25 c. 0.25; 0.125 d. 0.125; 0.0625 e. 0.0625; 0.03125
Calico cats are never male because:a
recessive genes are not usually expressed on their X chromosome. b. male hormones prevent expression of the calico phenotype. c. two different X chromosomes are needed for the expression of the calico phenotype. d. two different Y chromosomes are needed for the expression of the calico phenotype. e. one X chromosome and one Y chromosome are needed for the expression of the calico phenotype.