The release of most nitrogen oxides comes from ____
a. ammonia-oxidizing bacteria
b. the use of DDT
c. coal-burning power plants
d. drilling for gasoline and oil
e. combustion of gasoline and oil
ANSWER: e
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Which of the following is the primary role of modern zoos in conservation efforts?
a. providing wildlife education to the public b. breeding and releasing endangered species c. raising funds and awareness for conservation preserves d. restoring keystone species to their original ecosystems
The most closely related animal to vertebrates are the:a
Hemichordata. b. Urodela. c. Cephalochordata. d. Ophiuroidea. e. Urochordates
In humans, straight thumbs are caused by the dominant allele T, while individuals who are tt have thumbs that curve backward ("hitchhiker's thumb")
Consider a family in which the father has straight thumbs, and both the mother and their only child have curved thumbs. What is the chance that their next child will have curved thumbs? A) 25% B) 50% C) 75% D) 100%
What is the correct order of gene expression in the early Drosophila embryo?
A. gap genes, pair-rule genes, segment polarity genes B. gap genes, segment polarity genes, pair-rule genes C. pair-rule genes, gap genes, segment polarity genes D. segment polarity genes, pair-rule genes, gap genes