Which of the following is not true of monocot leaves?
a. Many monocots have a distinct palisade layer.
b. Many monocots lack a petiole.
c. Many monocots lack a distinct spongy layer.
d. Many monocot leaves are narrow.
e. Many monocot leaves wrap around the stem forming a she
A
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Cystic fibrosis is caused by a recessive loss-of-function mutation that encodes a protein called the ________
A) cystic fibrosis transmembrane ion channel B) chloride ion transmembrane conductance regulator C) cystic fibrosis transmembrane conductance regulator D) cystic fibrosis ion channel regulator
A recessive allele on the X chromosome causes color deficiency. A noncolor-deficient woman (whose father is color deficient) marries a color-deficient man. If they have a son, what is the chance that he will be color deficient?
A) 25% B) 0% C) 100% D) 75% E) 50%
A neuron subjected to a strong stimulus responds by increasing the _______ of its action potentials.
A. frequency B. size C. speed D. two of the above
Currently, for any organism to be considered as an animal it must:a
show evidence of locomotion. b. not be an autotroph. c. show evidence of sexual reproduction. d. have a brain and nervous system. e. be at the tissue level of organization