The control center in a cell is called . A: nucleus
B: mitochondria
C: cytoplasm
D: none of the above

What can be said about farmers in highly developed countries? a) they have little or no negative impact on the environment. b) they practice subsistence agriculture. c) they are able to incorporate polyculture into their farming practices. d) they utilize organic farming techniques on a regular basis. e) they rely on large amounts of energy from fossil fuels.

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.

Which type of transport is responsible for oxygen entering into blood cells? a. vesicle b. passive c. facilitated d. active b. passive