Clubfoot and cleft palate are traits
A. that are congenital birth defects.
B. that have discontinuous distribution.
C. that are multifactorial.
D. whose distribution can best be explained by the threshold model.
E. that have all of these characteristics.
E
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What is the equivalent of the mammalian mouth and nose in the respiratory system of insects?
A. Alveoli B. Tracheoles C. Spiracles D. Epithelial tissue
Which of the following is NOT true of
kwashiorkor?
a. it is the result of a diet poor in fatty acids b. symptoms include brittle hair c. symptoms include muscle loss and fatigue d. symptoms include an enlarged liver e. all of these are true of kwashiorkor.
Why is it essential that meiosis produce haploid cells?
A. so that the number of chromosomes will double each generation B. to produce haploid offspring C. to prevent the number of chromosomes from doubling each generation D. to produce diploid gametes E. to allow asexual reproduction
The common garter snake (Thamnophis sirtalis) is found throughout North America. In the South, it is active year round. In the North, it is active during the warmer months but hibernates during the winter
It is commonly found basking on warm rocks during cool mornings. This lifestyle indicates that the snake is probably A) ectothermic. B) photosynthetic. C) thermoneutral. D) endothermic.