Which of the following sex-linked disorders was common among the royal families of Europe, and all of the affected males could trace their ancestry to Queen Victoria of England?
A) fragile X syndrome
B) hemophilia
C) color-blindness
D) Duchenne muscular dystrophy
E) None of the answer choices is true.
Ans: B) hemophilia
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What type of tissue, consisting of a single layer of flattened cells, is designed to allow the easy diffusion of oxygen
from blood to tissue? a. simple connective b. simple squamous epithelium c. stratified columnar epithelium d. pseudostratified epithelium e. compound epithelium
The hominoids arose during which time period?
a. Eocene epoch b. Miocene epoch c. Pliocene epoch d. Holocene epoch e. Pleistocene epoch
Sixty years of data from the Framingham Heart Study showed that people with low cholesterol had 50% more offspring, on average, than those with high cholesterol. Since it is known that cholesterol level is highly heritable, what can be concluded from this specific observation?
A. High cholesterol reduces an individual's fertility. B. The frequency of people with low cholesterol should increase in the U.S. population. C. Cholesterol level has a major effect on survival. D. Natural selection is largely nullified as an important evolutionary mechanism in modern human populations. E. Ethnic groups that traditionally have more children have a greater frequency of genes for low cholesterol.
A human fecal sample is examined and found to contain a few strobila. The person is probably infected with
A) Echinococcus granulosus. B) Giardia intestinalis. C) Taenia. D) Schistosoma. E) Necator americanus.