Air enters the lungs when the diaphragm ________.
A. contracts
B. relaxes
Ans: A. contracts
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Which of the following species concepts might differentiate species on the basis of specific dietary requirements?
A. Ring species B. Ecological species C. Evolutionary species
Microorganisms and cellular debris are removed from lymph by the ________ and from blood by the ________
Fill in the blank(s) with correct word
Based on the table above, which of the following statements is not correct?
A) Cookies with the most fat were the cookies that were not only the flattest but also the largest in diameter. B) Cookies with the most fat were the cookies that were not only the flattest but also the driest. C) Cookies with the most fat were the cookies that were not only the thickest but also the largest in diameter. D) Cookies with the least fat were not only the heaviest but also the thickest cookies.
In an individual, an allele may be present and not express itself when
A. one allele is recessive and one allele is dominant. B. two recessive alleles are present. C. two dominant alleles are present. D. the individual is haploid.