Jill has a beaker. in this beaker there are two layers. the top layer is transparent with a yellow tint to it, and the bottom layer is transparent and clear. jill decides that the bottom layer is probably water. but what is the top layer? the top layer is most likely a a. nucleic acid b. amino acid c. lipid d. carbohydrate

Acommon kind of mechanical weathering is called

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.