When scientists experimentally simulated conditions near a hydrothermal vent, _____ appeared within a week
a. cells
b. nucleic acids
c. hydrocarbons
d. amino acids
e. lipid membranes
d
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What distinguishes expression vectors from other cloning vectors?
a. Expression vectors do not have an origin of replication. b. Only expression vectors have origins of replication. c. Expression vectors contain regulatory sequences to allow transcription and translation of an inserted gene. d. Inserted genes cannot be transcribed from an expression vector. e. Expression vectors do not contain antibiotic resistance genes.
What is it called when the gene pool is fluxing because of the migration of individuals?
a. natural selection b. mutation c. gene flow d. genetic drift
A chicken has 78 chromosomes. A chicken cell will contain _____ chromosomes at the beginning of prophase and
_____ chromosomes after mitotic division is complete.
a. 78; 39 b. 78; 78 c. 39; 78 d. 156; 78 e. 78; 156
During a break at work you and a coworker begin discussing the topic of evolution. He indicates that he does not believe in evolution because it is just a theory about how life originated and this is in direct conflict with the beliefs he was taught during his childhood. How would you convince him that evolution is factual?
What will be an ideal response?