Name any four methods of irrigation and briefly describe them.. me out..

Why does bubbling occur when vinegar mixed with baking soda

Give two examples of what would occur if one of the pairs did not match or had an extra chromosomes. explain how this might occur, and if it would be dangerous to the individual. fast.

The distant ancestors of tigers may have had bodies without stripes. use the theory of natural selection to explain how tigers may have evolved to have stripes.