Of the following choices, which would require the cell to expend energy to move it across the membrane?

water

oxygen

carbon dioxide

protein

In what area of a plant leaf would one most likely find gaurd cells

Which statement isn't true about polymers? Polymers are complex molecules composed of random sequences of atoms. Polymers are large molecules composed of small monomeric units. Polymes are macromolecules.

New cells arise from both mitosis and meiosis. Describe the outcomes of each, in terms of the number of daughter cells, and the number of chromosomes in the daughter cells.

Homeostasis will be most affected by the removal of the

In eukaryotic cells, the process indicated by arrow A occurs in the

Which phrase defines a law? a possible explanation or answer to a scientific question that is based on prior knowledge or research and is testable A statement of fact that is generally accepted to be true and universal because it has always been

Which vessels allows for oxygen movement into the tissues

What is the difference between a physical and a chemical change

What is described by binary fission? A) The way prokaryotes move. B) The way prokaryotes produce energy. C) The way prokaryotes reproduce. D) The way prokaryotes digest nutrients.

There are many different ecological and environmental conservation methods. Which is not a conservation method? A) water harvesting B) fishing seasons and limits C) limiting of clear cutting of forests D) wind and wave erosion on coastal areas