During the follicular phase of the ovarian cycle,
A. meiosis I is completed to form the secondary oocyte.
B. progesterone is secreted from the corpus luteum.
C. estradiol is secreted from the cumulus mass.
D. both meiosis I and progesterone secretion from the corpus luteum occur.
E. both meiosis I and estradiol secretion from the cumulus mass occur.
E. both meiosis I and estradiol secretion from the cumulus mass occur.
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Which of the following is a marsupial mammal?
a. echidna b. hydrax c. Tasmanian devil d. manatee
The genotype is fixed at the moment of ____________________ and, barring mutation, is unchangingFill in the blank(s) with the appropriate word(s)
Peripheral chemoreceptors are specialized cells in contact with arterial blood that respond directly to changes in blood
A) pH. B)PO2. C) PCO2. D) PCO2 andPO2. E) PO2, pH, andPCO2.
In the earthworm, the typhlosole
a. Is the organ of locomotion b. Increases the absorptive area of the gut c. Grinds the food d. Produces secretions during mating e. Coordinates the contractions of the digestive system