Natural selection changes allele frequencies in populations because some __________ survive and reproduce more successfully than others.
A) alleles
B) loci
C) gene pools
D) species
E) individuals
Answer: E) individuals
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Which of the following is/are a benefit of genetic testing? Select all correct choices
A. Newborns can be screened for treatable diseases. B. Individuals can find out whether or not they carry harmful recessive alleles. C. Adults can find out whether or not they have specific risk factors for some diseases. D. Physicians can use the results of genetic testing to engineer drugs specific for an individual's genotype. E. None of these.
In cnidarians, the mouth of both the medusa and polyp form opens into an internal ____ where _____ digestion takes place
A. gastric cavity; extracellular B. gastric cavity; intracellular C. mesoglea; extracellular D. mesoglea; intracellular E. none of these
Which of the following is true?
a. No species of slime mold form colonies. b. All species of slime mold form colonies. c. Slime molds form colonies only for reproduction. d. Some species of slime molds form colonies.
A patient is brought into the ER in a coma. Upon inspection, the physician sees evidence of many new tattoos, as well as yellowing of the skin and eyes. What is the most likely cause of the patient's condition?
What will be an ideal response?