The microspore develops into a
A. megasporocyte.
B. zygote.
C. microsporocyte.
D. female gametophyte.
E. male gametophyte.
Answer: E
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Mendel's results and conclusions were accurate but are seen differently today because we now realize that
A) pea color is actually more complex than the human visual system can perceive. B) pea inheritance is different from human inheritance. C) single-gene traits are usually influenced by the environment and other genes. D) he didn't count enough peas to draw conclusions.
It is proposed that Cro-Magnons were responsible for the extinction of many large mammals during the Pleistocene epoch. How could this feat have been accomplished?
A. Cro-Magnon man was the first species of hominids to hunt in groups. This would have increased their chance of killing larger animals. B. Cro-Magnon man was the first species of hominid to use fire. This would have increased their success during hunting. C. Cro-Magnon man was the most efficient bipedal species. They would have been able to run after prey species more efficiently than any of their predecessors. D. Cro-Magnon man had an increase in tool technology that enabled them to kill animals from a distance.
Exotoxins, produced by Gram-negative bacteria, are highly antigenic and can be inactivated to form toxoids and used as vaccines.
a. true b. false
Dental caries in young children are associated with the presence of
a. Proprionibacterium. b. Prevotella. c. Actinomyces. d. Porphyromonas.