Consisting of the fossilized remains of seedless vascular plant life, ____ was the first fuel to be widely used by human
societies.
a. gasoline
b. petroleum
c. natural gas
d. crude oil
e. coal
ANSWER: e
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Which of the following is not a polysaccharide?
A) extensin B) glycogen C) cellulose D) starch E) chitin
Tay-Sachs disease
a. is controlled by a simple recessive gene. b. is a sex-linked disease more common in males. c. occurs only in those individuals that receive two copies of a defective recessive gene. d. is the result of the failure of chromosomes to separate so that an individual receives three instead of two chromosomes. e. depends on which parent passes the gene to the child.
In the surface waters of oceans, the two most limiting nutrients for primary productivity are
A) sulfur and phosphorus. B) sulfur and nitrogen. C) nitrogen and iron. D) nitrogen and phosphorus.
Homologous chromosomes migrate to opposite poles during
A) telophase II and cytokinesis. B) prophase II. C) anaphase I. D) metaphase I. E) metaphase II