Which of the following is NOT true of auxin?
a. it has an effect on the concentrations of
other plant hormones
b. it is present only is specialized tissues
c. it is made mainly in shoot apical meristems
d. it moves through the phloem
e. all of these are true of auxin
B
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Which vertebrates rely on a positive pressure filling mechanism to move air into their lungs?
A. human B. eagle C. bullfrog D. crocodile E. mouse
Discuss three physical or chemical properties of water and explain how each of these properties contributes to the importance of water for life on Earth to survive
What will be an ideal response?
This area of the retina has the most
photoreceptors and is relatively free of blood vessels. This area of the retina is the
a. cornea. b. optic disk. c. fovea. d. sclera. e. choroid.
Which cells are important elements that comprise cell-mediated immunity?
A) B cells B) cytotoxic T cells C) plasma cells D) complement proteins