What was the primary reason for Tibbetts and Izzo to manipulate not only the facial pattern but also the fighting behavior of the wasps they studied?
The results of their experiment are shown below. The fighting behavior was altered by the application of hormone that increased the wasps' aggressiveness.
a. to test whether hormone could artificially alter the fighting qualities of wasps
b. to test whether the alteration of facial patterns strengthens the fighting ability of wasps
c. to test whether the alteration of facial patterns would result in increased aggression
d. to test whether the facial pattern is a conventional signal that is kept honest by continuous testing from conspecifics
D
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a. 10 b. 25 c. 50 d. 75 e. 90
A human blastocyst normally implants in _____
a. an oviduct c. the uterus b. a seminferous tubule d. the vagina
Commercial inorganic fertilizers have greatly increased agricultural productivity. What is an advantage of using inorganic rather than organic fertilizers?
A) It is easier for plants to absorb nutrients in an inorganic form. B) Nutrients are released faster from inorganic fertilizers. C) Inorganic nutrients bind more tightly to soil particles. D) Inorganic fertilizers increase the water-holding capacity of the soil.
Cleft palate is a hereditary condition in which the maxillae do not completely fuse before birth. Which of the following activities likely will be more difficult with cleft palate?
A) breathing B) looking over the shoulder C) eating and speaking D) salivating