A mass extinction, in which the dinosaurs disappeared from Earth, occurred approximately ____ years ago
a. 6500
b. 65,000
c. 650,000
d. 65,000,000
e. 650,000,000
ANSWER: d
You might also like to view...
What is the most inclusive level of the hierarchial classification scheme?
A. domain B. phylum C. kingdom D. genus E. species
Which of the following genetic testing techniques would be the best choice for detecting a chromosome translocation?
A) FISH B) Microarray analysis C) VNTR analysis D) ASO test E) RFLP analysis
The function of upstream promoter elements in eukaryotes, such as enhancers and silencers, is to:
a. serve as binding sites for RNA polymerase. b. regulate the efficiency of transcription initiation. c. regulate RNA polymerase binding to the TATA box. d. encode enhancer and silencer proteins. e. add methyl groups to genes.
Which example of an evolutionary adaptation decreases herbivory?
A) Plants of the milkweed family produce a toxin that Monarch butterflies can store in their bodies. B) Corn plants attacked by herbivores release an airborne chemical that turns on defensive genes in nearby corn plants. C) Caterpillars that feed on plants tend to be green. D) Damaged, partially eaten leaves can seal off the damaged area by hardening cell walls.