In human females, the ovarian cycle begins when the ________

A) levels of estrogen reach their maximum
B) hypothalamus stimulates the anterior pituitary to increase its output of FSH and LH
C) level of progesterone drops precipitously
D) levels of FSH and LH drop precipitously


B

Biology & Microbiology

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What will be an ideal response?

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If ionizing radiation affects a germ cell,

a. no sperm or eggs will be made. b. more eggs and sperm than normal will be produced. c. sperm and eggs will contain the diploid number of chromosomes. d. damage to the DNA will be inherited by an infant causing genetic defects. e. no problems will arise.

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The lipid layer that forms the foundation of cell membranes is primarily composed of molecules called ________.

A. fats B. phospholipids C. proteins D. carbohydrates

Biology & Microbiology

A rain shadow is caused by

A) ocean currents that heat and cool more quickly than do air or landmasses. B) cool, dry air that warms as it moves down over a mountain, picking up moisture. C) large mountain masses in the center of continents that restrict air flow. D) ocean currents that heat and cool more slowly than do air or landmasses. E) warm, moist air that cools as it moves down over a mountain, releasing moisture.

Biology & Microbiology