Cilia in the trachea move mucus toward the ________.

A. epiglottis
B. brinchioles


Answer: A. epiglottis

Biology & Microbiology

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Alternate forms of a gene are called ____

a. homologues b. loci c. alleles d. homozygous e. heterozygous

Biology & Microbiology

Increased carbon dioxide concentrations may contribute to

a. ozone depletion. b. global warming. c. eutrophication. d. groundwater contamination. e. biomagnification.

Biology & Microbiology

Threatened species

A. are species likely to become endangered in the future. B. are found only in captivity. C. will be extinct within 100 years. D. are rare species that are exploited by humans.  E. are currently in danger of extinction throughout all or most of their range.

Biology & Microbiology

Which of the following cells is matched to an incorrect function?

A. Neutrophil-important antigen-presenting cell B. Macrophage-phagocytic cell C. Monocyte-precursor of macrophage D. Plasma cells-secrete immunoglobulins E. Natural killer cells-kill virus-infected and tumor cells

Biology & Microbiology