These linings contain goblet cells, which secrete ____ to help trap particles and protect the cells of the lining. Another type covers the ventral cavity and most of internal organs. These are called _____
Fill in the blank(s) with the appropriate word(s).
mucus, serous membranes
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An amino acid is to a protein as a ________ is to a nucleic acid.
A. glucose B. glycerol C. nucleotide D. fatty acid E. cellulose
At times when Earth’s climate was cooler than it is today, the polar ice caps ____, rainfall ____, and sea levels ____
a. retreated; increased; rose b. retreated; decreased; fell c. grew larger; increased; fell d. grew larger; increased; rose e. grew larger; decreased; fell
The population most likely to be affected by catheter-associated urinary tract infections is
A. women who have recently delivered a baby by caesarean section. B. women who abuse intravenous drugs. C. urban sex workers. D. elderly women in a nursing home.
The photoreceptor for photoperiodism and some other light-initiated plant responses is a group of blue-green pigmentsnamed:a
xanthophyll. b. carotene. c. chlorophyll. d. phytochrome. e. phycocyanin.