To exert effects on its target cell, ________ would require a second messenger
Fill in the blank(s) with the appropriate word(s).
epinephrine and acetylcholine
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The direction of expansion for a plant cell is determined primarily by ____
a. location of the cell plate b. the direction of cell division c. the direction to the nearest meristem d. orientation of cellulose microfibrils e. gravity
____________________ equalizes the dosage of functional genes carried on the X chromosome in
males and females. Fill in the blank(s) with the appropriate word(s).
What was the significance of Beadle and Tatum's experiment?
A) It resulted in the central dogma. B) It led to the discovery of bread mold. C) It resulted in the one-gene-one-enzyme hypothesis. D) It led to the discovery of the genetic code. E) It proved that X-rays were mutagens.
Asexual reproduction and sexual reproduction are different in that
A) individuals reproducing asexually transmit 100% of their genes to their progeny, whereas individuals reproducing sexually only transmit 50%. B) asexual reproduction produces offspring that are genetically identical to the parents, whereas sexual reproduction gives rise to genetically distinct offspring. C) asexual reproduction involves a single parent, whereas sexual reproduction involves two. D) asexual reproduction only requires mitosis, whereas sexual reproduction always involves meiosis. E) all of the above