Which of the following is a way that sulfur dioxide can enter the atmosphere?

a. Natural surface run-off
b. Commercial livestock farming
c. Use of artificial fertilizer
d. Burning of fossil fuels


d. Burning of fossil fuels

Sulfur dioxide can enter the atmosphere through the burning of fossil fuels. It can also enter the atmosphere through the decomposition of organic molecules and from volcanic activity and geothermal vents.

Biology & Microbiology

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The cellulase-excreting protist that can account for up to one-third of the biomass of a termite is a member of the genus

A. Trichonympha. B. Euglena. C. Hexamida. D. Trichomonas.

Biology & Microbiology

In rabbits, long hair and black fur are produced by the dominant alleles L and B, which assort independently. The genotype ll produces short hair and the genotype bb produces white fur

A cross between a male with short, black fur and a female with long, white fur produces four offspring with short, black fur, four offspring with long, white fur, four offspring with short, white fur, and four offspring with long, black fur. What are the genotypes of the parents? A) llBB × LLbb B) LlBb × LlBb C) llBb × Llbb D) LLBB × llbb E) Impossible to determine from the information given.

Biology & Microbiology

Contrast negative (repressor) and positive (CAP) control in the lac operon

What will be an ideal response?

Biology & Microbiology

The term ________ means that stem cells retain the capacity to divide, in some cases for the entire life of the organism

Fill in the blank(s) with correct word

Biology & Microbiology