The ____ hormones are vital to growth, development, maturation, and metabolism in all vertebrates
a. thyroid
b. parathyroid
c. adrenal
d. gonadal
e. insulin
ANSWER: a
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The presence of cholesterol in the plasma membranes of some animal cells _____
A) enables the membranes to stay fluid when cell temperature drops B) enables the cell to remove hydrogen atoms from saturated phospholipids C) enables the cell to add hydrogen atoms to unsaturated phospholipids D) makes the cell membrane less flexible, allowing it to sustain greater intracellular pressure E) reduces mutations to genetic material inside the cell
What are the components of the Janzen-Connell hypothesis? Select all correct choices
A. Seeds located close to plants of the parent generation will have a higher survival rate. B. Seeds located far away from the parent generation will have a higher survival rate. C. Seeds from rare plants will have a higher survival rate. D. Seeds from common plants will have a higher survival rate.
Microfilaments are assembled from ____
a. keratin b. myosin c. laminin d. actin e. tubulin
Phenylketonuria is a result of a deficiency of the enzyme ____________________. Fill in the blank(s) with the appropriate word(s)