Which of the following is a microbial product used to reduce crop damage?

A. Bt toxin
B. saxitoxin
C. ice-minus
D. both Bt toxin and ice-minus
E. both Bt toxin and saxitoxin


Answer: D

Biology & Microbiology

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The rate of killing by an antimicrobial agent may slow when the microbial population has been greatly reduced because the remaining population may have a high proportion of resistant organisms.

Answer the following statement true (T) or false (F)

Biology & Microbiology

A situation in which the birth rate equals the death rate is called:

a. an intrinsic limiting factor b. exponential growth c. saturation d. zero population growth e. geometric growth

Biology & Microbiology

Which of the following is not a type of symbiosis?

A. parasitism B. mutualism C. commensalism D. predation E. None of the answer choices is correct.

Biology & Microbiology

How old was the world thought to be when Darwin began his voyage? How old is it thought to be

now? What will be an ideal response?

Biology & Microbiology