Different geographical barriers physically separated the tortoises on the Galápagos Islands. This separation resulted in the evolution of subspecies. This is an example of _____ speciation.
a. prezygotic
b. postzygotic
c. sympatric
d. outgroup
e. allopatric
Answer: e. allopatric
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In eukaryotes the nucleus is duplicated in a process called:
a. binary fusion. b. meiosis. c. mitosis. d. fusion. e. cloning.
The functions of the nasal conchae are to enhance the air turbulence in the cavity and to increase the mucosal surface area exposed to air for greater efficiency.
Indicate whether the statement is true or false
In a given bacterium, transcription of housekeeping genes is normal, but genes involved in nitrogen metabolism, stress, and chemotaxis are disrupted. Which sigma subunit is intact?
A) ?28 B) ?32 C) ?35 D) ?54 E) ?70
All of the following are sources of variation in the inherited traits of a population except: a. UV radiation b. crossing over c. independent assortment d. sexual reproduction e. mitosis
What will be an ideal response?