water and dissolved minerals are conducted from the roots to the stems and leaves via , whereas sugar is conducted through specialized cells known as

Which of these is not a function of some membrane proteins ? a.allowing polar molecules to enter the cell b.recognizing other types of cells c.receiving messeges from other cells b.carrying messages to oher cells

In the african savanna,more wildebeests are born than the environment can support. which is most likely to happen over a period of years as a result

Which codon is the code for the amino acid histidine (his)?