Why does dna use thymine instead of uracil?

Ecosystem must flow through sun

Which is a cause of wind? solar eruptions an uneven heating of the atmosphere a sunny weather pattern followed by a cloudy weather pattern rainy weather

Is creating "designer babies" ethical? why or why not

How could you use biotechnology to protect a plant from insect damage? a) insert Gene's that anti-insect chemicals into the plant b) insert Gene's that produce insulin into the plant c) add naturally produced anti-insect chemicals to the soil d)

In 1944 charlie chaplin was involved in a legal battle over the paternity of a child born to joan berry, a young starlet. the baby was blood type b, the mother a, and chaplin o.

The burning of fossil fuels contributes to

The students are studying for an exam in pharmacology. They know several local anesthetics have been covered along with other forms. Which medication can they anticipate as being local anesthetics on the exam? a) marcaineb) xylocainec) novocain

Why does the enzyme tryPsin get deactivated when ontroduced in the gastric juice of the stomach?

Skin cells are lost daily even without injury. Which best describes the purpose of the cell cycle for skin cells in this circumstance?

The chromatin becomes visible as chromosomes in which phase?