Brass gets discoloured in air because of the presence of which of the following gases in air?

A. Oxygen

B. Hydrogen sulphide

C. Carbon dioxide

D. Nitrogen

The main job of the small intestine is to

The 20 amino acids vary only in their? a. carboxyl groups b. side groups c. amino groups d. lipid groups

To store strawberries in sugar syrup, Lucy placed them in a jar and covered them with sugar but did not add any water. Do you think syrup will be formed? Justify.

What is the name of molecules that store and process genetic information?

Water expands when it freezes

Think about a flower growing in your garden you notice that all of the leaves are falling off why is this a problem for the plant

How does polymerase chain reaction make DNA fingerprinting more reliable

A) What are the bases of mRNA coded for by this section of DNA before the mutation? Hint in RNA A pairs with U.

How does secondary succession differ from primary succession? It begins where no plants have grown. It begins on bare rock or land. Soil nutrients are already in place. Lichens and mosses form soil first.

True of False? The structure of the cell membrane is what allows water and other molecules to move in and out of cells.