Which of the following function as opsonins?

A) antibodies
B) antigens
C) complement fragments
D) both a and c


D) both a and c

Biology & Microbiology

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Which of the following is not paired correctly?

A. endoderm: kidneys B. ectoderm: posterior pituitary gland C. mesoderm: circulatory system D. endoderm: liver E. ectoderm: nervous system

Biology & Microbiology

Hydroponic culture is the process of ____

a. growing plants in pure water mixed with carefully measured amounts of specific minerals b. irrigation of dry areas to improve mineral absorption by plants c. growing plants in ponds and lakes to improve their access to water, allowing the plants to place more resources into the shoot system d. irrigation of dry areas to prevent crop plants from wilting e. growing plants with specific hydrocarbons added to the soil to test the effect on plant growth

Biology & Microbiology

A female bowerbird being unable to recognize

the mating ritual of a male toucan is an example of what type of isolating mechanism?

a. genetic b. ecological c. behavioral d. mechanical e. temporal

Biology & Microbiology

What structures are divided during cytokinesis?

A. cytoplasm and organelles B. cell membrane and chromatin C. nuclei D. cytoplasm and chromosomes E. none of these

Biology & Microbiology