The dinosaurs (other than birds) went extinct during the asteroid impact at the K-P boundary because they were poorly adapted to their ecological niches.
a. true
b. false
Answer: b. false
You might also like to view...
A positive allosteric effector will ________ the activity of an enzyme while a negative effector will ________ the activity.
Fill in the blank(s) with the appropriate word(s).
Taq polymerase is commonly used in PCR reactions because it ____
a. keeps the primers from annealing to the DNA b. makes fewer DNA replication errors than other DNA polymerases c. is a heat-stable DNA polymerase d. is more efficient at replicating DNA than other DNA polymerases e. helps the primers anneal to the correct DNA sequence
What percentage of the species that have ever lived have become extinct?
a. 1 percent b. 9 percent c. 50 percent d. 75 percent e. 99 percent
Reproductive isolation often occurs due to
a. geographic separation. b. species incompatibility. c. mutation. d. genetic drift. e. natural selection.