7. Four types of biomolecules are needed for cells to work correctly. Which biomolecule is NOT correctly paired with its function?
proteins - speed up chemical reactions
O
carbohydrates - direct the activities of the cell
o
lipids - used for long-term or stored energy
nucleic acids - carries the genetic code, examples are DNA and
RNA

Put the following steps of the convection process in the correct order. 1. gravity pulls cooler matter downward. 2. the matter expands and decreases in density. 3. an up-and-down flow of matter produces a convection current. 4. matter is heated. 5. warmed matter is forced upward. question 2 options: a) 4, 2, 5, 1, 3 b) 2, 4, 3, 1, 5 c) 3, 2, 5, 4, 1 d) 1, 4, 2, 5, 3

Which mechanism of transport takes place when solute particles move from a region of high concentration to a region of low concentration? active diffusion isotonic osmosis

Which greenhouse gas is emitted when burn fossil fuels for energy? a.nitrogen b.oxygen c.carbon dioxide d.helium