The energy input into an ecosystem can come from
A.) Sunlights
B.) Chemicals Compound
C.) Soil
D.) A and B

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?

Which statement best compares aerobic and anaerobic respiration

Pls me i need this ! each cell has genes activated depending on it's job and what kind of cell it is. it is the presence of that causes the repressor protein to fall off and unblock the gene on the lac operon. if a gene is turned on then it is being an additional circular chromosome found in some bacteria that is used in genetic engineering.