What does the notation rr mean to geneticists\

What processes take place before the mature mrna exits the nucleus?

Explain how light energy is turned into chemical energy? ! due tomorrow!

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?