The Punnett square illustration above shows
that theoretically
a. half of human sperm carry a Y
chromosome.
b. half of human zygotes are XY.
c. all zygotes carry an X chromosome.
d. gender depends upon which type of sperm
fertilizes the egg.
e. all of these are true
E
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How is the activity of a riboswitch controlled?
A) by other riboswitches B) metabolite binding can change its structure C) sigma factor binding alters its structure D) small RNA complementary binding disrupts its function
Plants have collections of totipotent stem cells called ____
Fill in the blank with the appropriate word.
The rasping tongue, the radula, is present in which molluscan group?
A. bivalve B. oyster C. clam D. snail E. scallops
In alcoholic fermentation, the final product is ____
a. pyruvate b. ethanol c. acetaldehyde d. acetyl CoA e. lactate