What marks the beginning and end of a gene on a dna molecule?

For many years, it was believed that the Earth was flat, that the Earth was the center of the universe, and that the fire and water were part of the basic building blocks of life.

Which process contributes the most to the salts found in seawater?

Which of the following is a result of the greenhouse effect? A. The greenhouse effect is causing the sea level to rise. B. The greenhouse effect is melting the polar ice caps. C.

The process of copying genetic information from dna to rna is called

Which planet is known for its planetwide scarps? A Mercury B Mars C Venus D Earth

Cells exchange what with other cells

What would the result be if a drug that blocks the action of rna polymerase was introduced into a virus-infected organism?

Which of the following changes to the local hydrologic cycle will result if large areas of land experienced clear-cutting? Transpiration of water from vegetation will increase. Evaporation of water from the soil will increase.

During mitosis, sister chromatids are pulled apart by?

In order for an organism to become a fossil, it must be: