What conditions favor humus buildup?

a. well aerated soil
b. low water content soil
c. plant-sparse areas such as deserts
d. waterlogged soil
e. high clay content soil


d

Biology & Microbiology

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Human skin color is an example of ____, while sickle-cell anemia is an example of ____

a. multiple alleles; epistasis b. incomplete dominance; multiple alleles c. polygenic inheritance; pleiotropy d. pleiotropy; polygenic inheritance e. incomplete dominance; pleiotropy

Biology & Microbiology

In a population of organisms, beneficial and harmful random mutations are retained or eliminated through the process of:

A) expression B) folding C) selection D) translation E) conservation

Biology & Microbiology

The ________ are the simplest animals to have an excretory system. (Hint: This system consists of cilia beating within canals.)

Fill in the blank(s) with correct word

Biology & Microbiology

Mannose sugar occurs on the surface of some bacteria and fungi and can trigger the

A) release of cytotoxins by NK cells. B) release of histamines by basophils. C) classical pathway of complement activation. D) lectin pathway of complement activation. E) release of NETs by neutrophils.

Biology & Microbiology