Which white blood cell type are concentrated in the lining of respiratory passages, are important phagocytes that
protect the lungs, and present antigens to T cells?
a. B lymphocytes
b. macrophages
c. neutrophils
d. dendritic cells
e. mast cells
ANSWER: d
Biology & Microbiology
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What will be an ideal response?
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Unlike terrestrial plants, submerged aquatic plants lack
A) leaves. B) chlorophyll. C) stomata. D) stems.
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Foreign genes can be inserted into a single plant cell that is then cultured to produce
A) a genetically modified plant. B) genetically modified seeds. C) a new plant species. D) clones of the organisms from which the genes were taken.
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