The key phagocytic cells of the body are the

A) Macrophages and monocytes
B) Neutrophils and macrophages
C) Natural killer cells
D) Basophils and neutrophils
E) Eosinophils and macrophages


B) Neutrophils and macrophages

Biology & Microbiology

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The mechanism of evolution proposed by Charles Darwin in The Origin of Species is

A) acclimatization. B) natural selection. C) acquired inheritance. D) adaptation.

Biology & Microbiology

Together, follicle-stimulating hormone and luteinizing hormone are

A. metabolic hormones. B. growth hormones. C. adrenocorticotropic hormones. D. gonadotropic hormones.

Biology & Microbiology

The longer two populations are kept from interbreeding, the:

A) greater the mutation rate will be. B) more recessive alleles will be expressed. C) greater the chance one will go extinct. D) more they will differ from one another in adaptations.

Biology & Microbiology

Evolution is defined as the change in ___________ in a species population over time

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology