The partly decayed organic portion of soil is called:a

silt.
b. clay.
c. sand.
d. humus.
e. castings


D

Biology & Microbiology

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A physical relationship where an organism hosts more than one symbiont is known as a

A. consortium. B. clade. C. cojoining. D. partnership.

Biology & Microbiology

Which bone, A, B, C or D, is the femur?

1.A 2.B 3.C 4.D

Biology & Microbiology

In the tryptophan operon, the repressor actively binds to the operator when:a

tryptophan binds to an allosteric site on the repressor. b. tryptophan levels are low. c. lactose levels are low. d. there is a great need for proteins. e. allotryptophan levels are low.

Biology & Microbiology

Fill in the blanks to complete the following statements. ?

Organisms that carry a disease agent to the host are referred to as _______________.? Fill in the blank(s) with correct word

Biology & Microbiology