Pure water has a water activity value of

A. 1.00.
B. 0.80.
C. 0.70.
D. 0.90.


A. 1.00.

Biology & Microbiology

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The primary function of the integument of an ovule is to _____

A) protect against animal predation B) ensure double fertilization C) form a seed coat D) direct development of the endosperm E) produce hormones that ensure successful pollination

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If you know that a DNA double helix consists of 20 % adenine, what percentage of the DNA double helix is guanine (G)?

A. 20% B. 80% C. 30% D. There is not information to know

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Explain the effects of a somatic mutation on the individuals and their offspring if the mutation is recessive or dominant

What will be an ideal response?

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The bacterium Agrobacterium tumefaciens

a. forms a nitrogen-fixing symbiosis with plants. b. forms a symbiotic relationship with plant roots. c. causes plant wilt. d. causes crown gall disease.

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