Which of the following groups of elements accounts for more than 95% of the human body by weight?
A. Calcium, hydrogen, oxygen, nitrogen
B. Carbon, hydrogen, oxygen, nitrogen
C. Carbon, phosphorus, oxygen, hydrogen
D. Calcium, phosphorus, hydrogen, nitrogen
Answer: B
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Which of the following is the term for a male adult ferret?
a. sprite c. hob b. gib d. jill
What ceramic-like substance covers the crown of a tooth?
A) cement B) root C) enamel D) pulp E) dentin
One of the biggest challenges facing terrestrial organisms is to
A) Escape from predators. B) Survive food shortages. C) Reduce water loss. D) Find shelter.
Sperm move to the uterine tube through uterine contractions and the energy of their own flagella. What other factor is involved in sperm movement?
A) reverse peristalsis of the uterus and uterine tubes B) the cilia on the apex of the cells lining the endometrium C) hormonal attraction to the ova D) the increased temperature in the vagina, which stimulates sperm motility