Which is a correct statement about mutations?
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a. mutations ensure alleles never change.
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b. mutations decrease variety in the population.
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c. mutations are always bad.
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d. mutations increase variety in a population.

Which are characteristics of flukes? check all that apply. a they are free living. b they are a type of flatworm. c they reproduce sexually. d they have eyespots. e they are segmented.

Many body systems work together for proper functioning of the body and to maintain internal homeostasis. the works to break down food eaten before exercising. the takes in the nutrients obtained from the food. the body sweats as a mechanism to cool off, because the is working to flush out toxins.

Which allele is expressed in the first-generation offspring of parents that have two different traits? a. the segregated allele b. the true-breeding allele c. the recessive allele d. the dominant allele