Which of the following hormones is (are) NOT a product of the anterior lobe of the pituitary?
A. gonadotropic hormones
B. thyroid-stimulating hormone
C. antidiuretic hormone
D. growth hormone
Answer: C
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________ mutations occur in the promoter or operator region of a gene or set of genes and affects the expression of the downstream genes without affecting the amino acid sequences of the gene products.
Fill in the blank(s) with the appropriate word(s).
In the accompanying figure, the purpose of growing the donor cells in nutrient-limited media is to:
a. have small cells that would be easier to manipulate.
b. replicate a normal environment.
c. force the donor cell nucleus into the G0 cell stage.
d. induce favorable mutations.
e. initiate apoptosis.
You are conducting a long term study of ecosystem functioning in a freshwater lake. You and your field assistants gather data for many biotic and abiotic factors, including species diversity, water and benthic quality, and turbidity. Over the ten years of your study, you find that the abundance of water lilies is correlated with several other factors. When water toxicity and turbidity are high and water pH is abnormally low, water lilies quickly become scarce, followed by periods where fish, amphibians, and water birds are also scarce or absent. In years water nutrient levels are very high, water lilies quickly become abundant, followed by years where wading birds are scarce. From these data, you conclude that water lilies are
A. an indicator species. B. an endemic species. C. an umbrella species. D. a keystone species. E. a flagship species.
Mammals have the most complex nervous system of all vertebrates
Indicate whether the statement is true or false