If a changing environment increases rates of evolution, why do we see an increase in extinction rates following rapid global catastrophes?
What will be an ideal response?
Either the change is too swift to allow a population time to evolve or the extinction of some species opens up niches for other species to evolve to fill.
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All cellular organisms can be placed into one of three ________, which include the Bacteria, Archaea, and the Eukarya.
Fill in the blank(s) with the appropriate word(s).
12C, 13C, and 14C are all isotopes of carbon. They differ in their
a. overall charges. b. number of electrons. c. number of protons. d. number of neutrons. e. electron energy shells.
In a population of purebred cats, over 75% of the alleles present can be dated back to just 16 individuals belonging to a cat breeder from the late eighteenth century. Based on this, what statement(s) about the cat population are accurate?
A. Mutations rates will be higher in the purebred cat population than in most domestic cat populations. B. Rapid evolutionary change will be seen in the purebred cats over time. C. Further evolutionary change in the purebred cats is unlikely. D. Very little genetic variation exists in the purebred cats. E. Inbreeding has led to high levels of genetic variation in the purebred cats.
In humans, individuals with trisomy of which chromosome are most likely to survive until adulthood?
A. 13th B. 21st C. 18th D. 15th