Females need more dietary iron than males because they
A) lose more iron (during menstruation).
B) have fewer red blood cells.
C) have less bone marrow.
D) eat less red meat than males.
E) have a smaller volume of blood.
A
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The myometrium is
a. the lining of the uterus. b. the lining of the vagina. c. the tissue that covers an ovary. d. smooth muscle in the wall of the uterus. e. the lining of the oviducts.
Which of the following are forms of carrier-mediated transport?
a. Facilitated diffusion only b. Carrier-mediated active transport only c. Osmosis only d. Both facilitated diffusion and carrier-mediated active transport e. Facilitated diffusion, carrier-mediated active transport, and osmosis
Tay-Sachs disease is a caused by a mutation that ________
A) affects lipids B) causes abnormal hemoglobin structure C) causes excess mucus D) causes blindness and retardation E) can be diagnosed by using a karyotype
Which of the following are the best examples of homologous structure?
a. The finger bones found in humans, bats, and whales b. Wings in both birds, bats, and bees c. Beaks of birds and squid d. The streamlined, hydrodynamic bodies of both dolphins and sharks