Which of the following populations will have the smallest number of genetically different individuals in it?
A. a population of asexually reproducing lizards initiated by one female
B. a small island population of water snakes
C. a large cornfield of hybrid corn in Iowa
D. the robin population of Michigan
A. a population of asexually reproducing lizards initiated by one female
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Humans become infected with the malarial parasite when mosquitoes inject ________ into the bloodstream.
A. sporozoites B. schizonts C. merozoites D. trophozoites
If the sequence of bases in the template strand of a DNA molecule is 3' ATCGCTCC 5', what is the sequence of bases in the RNA that is transcribed from this molecule?
A. 5' TAGCGAGG 3' B. 3' TAGCGAGG 5' C. 5' AUCGCUCC 3' D. 5' UAGCGAGG 3' E. 3' UAGCGAGG 5'
The organelle involved in intracellular digestion of food particles is the
A. smooth endoplasmic reticulum. B. transitional vesicle. C. mitochondria. D. lysosome. E. Golgi apparatus.
Major changes in ocean conditions during the early Cambrian period were probably linked most closely to the evolution of __________.
a. cyanobacteria b. algae c. suspension-feeding animals d. large and motile predatory animals e. vertebrates