Which of the following is NOT a feature of
trypanosomes?
a. anaerobic respiration
b. single, large mitochondrion
c. cause widespread and serious infections of
humans and cattle in the tropics
d. life cycle involves an intermediate, bloodsucking
insect host
e. causative agents of Chagas disease and
African sleeping sickness
A
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A woman with normal blood clotting mates with a man who has hemophilia. Their first child is a boy who has
hemophilia. Tests show that the father and son both have the same form of hemophilia, that it is X-linked, and that the boy has normal genetic inheritance. You can predict that if the couple has more children together, it is likely that ____.
a. all of the children will have hemophilia b. half of the boys and none of the girls will have hemophilia c. none of the other children should have hemophilia d. all of the boys and half of the girls will have hemophilia e. half of the boys and half of the girls will have hemophilia
The ABO blood types have ____ different genotypes
a. 4 b. 6 c. 8 d. 12 e. 16
In order to survive and reproduce, a cell needs
a. an energy source. b. raw materials. c. a suitable environment. d. DNA. e. all of these
In an isotonic contraction of a skeletal muscle,
a. the tension in the muscle increases. b. movement occurs. c. no movement occurs. d. both a and c occur.