Biology 1st Semester Review

Front

The main source of energy for all life comes from ____.

Back

the sun

Front

Photosynthesis occurs in the chloroplasts and cellular respiration occurs in the _____.

Back

mitochondria

Front

After photosynthesis, plants store their energy as _________.

Back

glucose (sugar)

Front

What is the purpose of the nucleus?

Back

It is the command center, contains DNA, and cell division.

Front

What is it called when a cell is placed in a solution that has a greater concentration on the outside of the cell than inside?

Back

Hypertonic

Front

What is photosynthesis?

Back

The process by which green plants use sunlight to synthesize foods with the help of chlorophyll.

Front

What is cellular respiration?

Back

The process by which cells convert glucose and oxygen into energy, carbon dioxide, and water.

Front

Define osmosis.

Back

The movement of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the role of chlorophyll in photosynthesis?

Back

Chlorophyll is the green pigment in plants that absorbs light energy for photosynthesis.

Front

What is homeostasis?

Back

The ability of a cell or organism to maintain a stable internal environment despite changes in external conditions.