Which of the following statements about a root cap is false?
a. It protects the delicate root apical meristem
b. It secretes lubricating polysaccharides
c. It orients the root that it grows downward
d. It loses cells during root growth.
e. It absorbs nutrients
e
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Ethylene oxide is gas that
A. is very useful for sterilizing heat or moisture-sensitive items. B. is potentially carcinogenic. C. is used as a 37% aqueous solution. D. is effective against all microorganisms except endospores and viruses. E. is very useful for sterilizing heat or moisture-sensitive items AND is potentially carcinogenic.
Ecdysone and juvenile hormone regulate molting and ____________ in insects.
A. metamorphosis B. sexual behavior C. body shape D. egg production
________ is caused by an interference with the blood supply to the brain.
A. Angina pectoris B. A stroke C. Arteriosclerosis D. Atherosclerosis
The smallest units that retain the properties of an element are _____.
A) atoms B) electrons C) molecules D) protons