3 years ago

Aerobic resAerobic respiration requires ___ to occur

Biology

1 answer:

qwelly [4]3 years ago

5 0

I believe in both carbon dioxide and oxygen

You might be interested in

Which era spans the least amount of time on the geologic scale?

Ludmilka [50]

Answer:

Trilobites

Explanation:

3 0

3 years ago

A. how do fossils help document the descent of modern species from ancient ancestors?

ElenaW [278]

They help in that, many recently discovered fossils form series that trace the evolution of modern species from extinct ancestors. Patterns in the distribution of living and fossil species tell us how modern organisms evolved from their ancestors. Evolutionary theory explains the existence of homologous structures adapted to different purposes as a result of descent with modification from a common ancestor.

4 0

3 years ago

Why does DNA flow toward the positive electrode of the gel chamber?

Digiron [165]

Answer:

DNA molecules have negative charges, and so when placed in an electric field they migrate toward the positive pole.

Explanation:

Electrophoresis is a technique that uses differences in electrical charge to separate the molecules in a mixture. DNA molecules have negative charges, and so when placed in an electric field they migrate toward the positive pole. The rate of migration of a molecule depends on two factors, its shape, and its charge-to-mass ratio.

A gel, which is usually made of agarose, polyacrylamide, or a mixture of the two comprises a complex network of pores, through which the DNA molecules must travel to reach the positive electrode. The smaller the DNA molecule, the faster it can migrate through the gel. Gel electrophoresis, therefore, separates DNA molecules according to their size.