Structures located at the ends of eukaryotic chromosomes are called ________
A) telomerases
B) recessive mutations
C) telomeres
D) centromeres
E) permissive mutations
Answer: C
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What is the function of the cremaster muscle?
A. It is the path through which sperm leave the body. B. It opens the cervix during childbirth. C. It is responsible for clitoral erection. D. It moves the testes to or away from the body
One method of maintaining the genetic isolation of a population is the inability of sperm to fertilize eggs of a different species. This is called
A) gametic incompatibility. B) behavioral isolation. C) hybrid inviability. D) ecological isolation. E) temporal isolation.
While walking in a tropical forest, you come upon a 6-meter-tall plant that shows no evidence of seed production. The plant is most likely a(n)
A) angiosperm. B) gymnosperm. C) alga. D) bryophyte. E) fern.
Explain the mechanics of muscle contraction during a heartbeat, including the stimulus for the contraction
What will be an ideal response?