An animal's somatic cells contain 2n chromosomes. What happens to the number of chromosomes in the animal's gametes?
A. the number is reduced to n by mitosis
B. the number is reduced to n by meiosis
C. the number is increased to 4n by mitosis
D. the number is increased to 4n by meiosis
Ans: B. the number is reduced to n by meiosis
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A. center of gravity B. valence number C. isotope D. nucleus
Malaria is caused by an __________, which is carried to a host by a __________
a. apicomplexan; fly b. apicomplexan; mosquito c. apicomplexan; body louse d. actinopod; fly e. actinopod; mosquito
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A) competitive exclusion B) an extinction vortex C) a mutualism D) the negative effect of heterozygosity on fitness
An organism that contains altered genes is considered all of the following EXCEPT
A) a genetically modified organism (GMO). B) genetically engineered. C) polymorphic. D) transgenic.