Which of the following atmospheric gases is changing the global climate?
A. hydrogen
B. carbon dioxide
C. oxygen
D. ozone
E. water vapor
Answer: B
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Examples of transgenic organisms include:
A. crop plants engineered to resist insect pests. B. rice enriched with vitamin A. C. sheep that produce a human protein in their milk that is used to treat emphysema. D. laboratory mice that develop heart disease and diabetes. E. All of the answer options are correct.
The term angiosperm refers to:
A. the narrow sperm of angiosperms B. the enclosure of the seed within a fruit C. the presence of endosperm D. the branching of vascular veins E. none of the other choices provided
Hummingbirds are
a. heterotherms. b. endotherms. c. ectotherms. d. ectotherms during the day and endotherms at night. e. none of these.
During translation, attachment of a "start" codon to the small ribosomal subunit constitutes the beginning of the ________ stage
Fill in the blank(s) with correct word