On Long Island, New York, a population of wall lizards that originated from a group in Italy is present. Several had been imported to be sold as pets many decades ago, and some escaped and started a new population in this suburban area
What concept applies to this situation? A) genetic drift
B) the founder effect
C) a population bottleneck
D) gene flow
B
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If the age of the Earth is 4.6 billion years old, for what percentage of this time is Earth thought to have been anaerobic?
A. 0.1% B. 27% C. 44% D. 68% E. 99.3
Which of the following is the best definition of sympatric speciation?
a. species that evolve due to geographical distance b. mechanical isolation acts to prevent speciation c. breeding behavior that prevents the organisms from breeding due to differences in their breeding time d. ecological isolation e. divergence within a population leads to speciation in the absence of a physical barrier to gene flow.
The normal outcome of mitosis is
A. to make cells smaller. B. to produce genetically identical copies of cells. C. to reduce the amount of DNA in daughter cells. D. differentiation.
RNA is thought to be the original polymer because it can ________ like proteins and ________ like DNA.
A. catalyze reactions, self replicate B. store information; catalyze reactions C. catalyze reactions; store information D. self replicate; catalyze reactions