The process by which species ceases to exist
A. has never occurred.
B. is speciation.
C. is extinction.
D. is occurring today at a faster rate than ever before.
E. All answers are correct.
C. is extinction.
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If an individual living in a northern climate has allergies in the late summer, it is most likely
due to
a. long-day plants. b. short-day plants. c. either short-day or long-day plants. d. There is not enough information given to determine which type of plant is involved.
Which statement about the geologic time scale is false?
a. Mammals originated early in the Mesozoic era. b. Radiations of marine invertebrates took place in the Mesozoic era. c. Mass extinction of the dinosaurs occurred about 65 million years ago. d. Reptiles originated during the Paleozoic era. e. Eukaryotes originated during the Proterozoic eon.
What is required for DNA polymerase to initiate DNA strand synthesis?
A) a short DNA primer synthesized by the enzyme primase B) a short RNA primer synthesized by the enzyme primase C) ATP and a short DNA primer synthesized by the enzyme topoisomerase D) ATP and a short RNA primer synthesized by the enzyme topoisomerase E) DNA polymerase initiates DNA strand synthesis without requiring any additional enzymes.
In situ hybridization allows one to "visualize" the location of labeled RNA or DNA in a tissue or cell
Indicate whether the statement is true or false