Human eggs undergo holoblastic cleavage during development.
Answer the following statement true (T) or false (F)
True
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Assuming geological evidence is accurate, life on Earth may have originated
a. 14 billion years ago. b. 4.6 billion years ago. c. 3.5 billion years ago. d. 2.1 billion years ago. e. 1.2 billion years ago.
Height, weight, and eye color are examples of phenotypes that illustrate
a. codominance. b. continuous variation. c. pleiotropy. d. incomplete dominance. e. multiple allele systems.
Two yeast cells, one of type a and the other of type ?, are in proximity to each other. The a yeast cell has a mutation in the gene for the ? factor receptor protein such that the receptor does not translocate to the plasma membrane of the a cell. If
both cells secrete their respective a and ? factors, which of the following outcomes is most likely to occur? A) The a and ? cells will grow toward each other. B) The a cell will grow towards the ? cell, but the ? cell will not grow toward the a cell. C) The ? cell will grow toward the a cell, but the a cell will not grow towards the ? cell. D) The a and ? cells will not grow toward each other at all.
At the breakfast table, your roommate says, "Oops! I forgot to take my melatonin last night. I'd better take it now." How do you respond?
A. "Don't take it after a meal - it promotes the 'fight-or-flight' response, not 'rest-and-digest'." B. "Good idea - you don't want your bones to get brittle." C. "Don't take it now - it regulates biological rhythms, and is normally high at night and low during the day." D. "Be sure not to take too much, or your blood sugar could get dangerously low."