In males, the primary source of estrogens is the ________
A) hypothalamus
B) heart
C) adrenal cortex
D) ovaries
C
Biology & Microbiology
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In the cells of a female mammal, ________ is(are) inactivated
a. either the maternal or paternal X chromosome b. all maternal X chromosomes c. all paternal X chromosomes d. both the maternal and paternal X chromosomes
Biology & Microbiology
Which of the following is a gastropod?
a. clam. b. snail. c. squid. d. octopus.
Biology & Microbiology
The best model organism for studying cell fate from fertilized egg through adult is
A) Arabidopsis thaliana. B) Caenorhabditis elegans. C) Drosophila melanogaster. D) Mus musculus. E) Saccharomyces cerevisiae.
Biology & Microbiology
Segmentation is the primary means of mechanical breakdown of food in the digestive tract
Indicate whether the statement is true or false
Biology & Microbiology