Although most of the estrogen and testosterone produced in the human body is made by the ovaries and testes, respectively, small amounts of these hormones are also produced by the ________
Fill in the blank(s) with correct word
adrenal cortex
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Cytoplasmic division in animal cells involves
all EXCEPT a. formation of a cell plate. b. a contractile ring mechanism. c. a deepening cleavage furrow. d. a ring of actin filaments under the plasma membrane at the equator. e. ATP.
Penetrance specifically refers to the expression of lethal genes in heterozygotes
Indicate whether the statement is true or false
Which of the following statements regarding coliform bacteria is correct?
A. Coliforms derive from the intestinal tract and therefore indicate fecal contamination. B. Petri dishes used to enumerate coliforms are best incubated at 45-48°C. C. The presence of Klebsiella is a strong indicator of fecal contamination. D. Coliforms from the human and bovine GI tracts differ, so identifying the specific microbe will indicate the source of contamination.
The chromosomes align at the center of the cell during _______.
a) metaphase b) telophase c) prophase d) prometaphase e) anaphase