What is the first step in investigating any ecological question?
a) make observations
b) make a computer model
c) conduct and experiment
d) come to a conclusion
Ans: a) make observations
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Henrietta Lack died of
a. cervical cancer. b. breast cancer. c. polio. d. malaria. e. old age
The first cell of a new individual that is the
result of sexual reproduction is a
a. zygote. b. embryo. c. gamete. d. germ cell. e. sporophyte
Which of the following conclusions is supported by the research of both Went and Charles and Francis Darwin on shoot responses to light?
A) When shoots are exposed to light, a chemical substance migrates toward the light. B) A chemical substance involved in shoot bending is produced in shoot tips. C) Once shoot tips have been cut, normal growth cannot be induced. D) Light stimulates the synthesis of a plant hormone that responds to light.
As a rule of thumb, how much of the food energy taken in by an herbivore is passed on to a carnivore (primary consumer)?
A. 10% B. 1% C. 5% D. 90% E. 50%