The oxygen present in Earth's atmosphere has been produced as a waste product of the process of ________
Fill in the blank(s) with correct word
photosynthesis
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Which membrane protein is responsible for binding hormones that can trigger changes in the cell's activity?
a. recognition proteins b. receptor proteins c. transport proteins d. adhesion proteins e. channel proteins
Temperature extremes, lack of water, and other environmental stresses trigger an increase in which hormone?
a. gibberellin b. auxin c. abscisic acid d. ethylene e. cytokinin
The compound that Dr. Folling isolated from the urine of the Egeland children was ____________
A. phenylalanine D. phtalamine B. pyruvic acid E. pertussic acid C. phenylpyruvic acid
.During which phase of mitosis does the nuclear envelope fragment?
A) anaphase B) prophase C) interphase D) metaphase E) cytokinesis