A stroke volume in the heart of 70 mL/cycle, with a pulse of 72 cycles per minute, results in a cardiac output of
A) 5 L/minute.
B) 504 mL/minute.
C) 0.5 L/minute.
D) 50 L/minute.
E) 500 L/minute.
Answer: A) 5 L/minute.
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You discover a gene that results in a complete lack of hair in rats, and you name the gene "chromedome." A cross of homozygous normal and homozygous bald rats results in all bald rats. You conclude that the baldness allele is dominant, but when you repeat the cross with different rats none of the offspring are bald. Extremely puzzled you study your records and discover that in the first cross the bald rat was female, while in the second cross the bald rat was male. What do you conclude from this information?
A. Chromedome is imprinted in females. B. Chromedome is imprinted in males. C. Chromedome is dominant in females and recessive in males. D. Chromedome is dominant in males and recessive in females. E. Chromedome is an X-linked gene.
Uncontrolled cell division can be referred to as which of the following?
a. diabetes b. atherosclerosis c. cancer d. mitosis
The meiosis that produces the microspores is
indicated by a. A. b. B. c. C. d. D. e. E.
Most fungi are
a. photosynthetic organisms. b. heterotrophic and saprophytic. c. chemoautotrophs. d. seasonal growers. e. any of these.