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Biology Unit 2 Terms

Horizontales
C6
Most abundant gas in the atmosphere
the envelope of gases surrounding the earth or another planet.
reactions of photosynthesis that use energy from light to produce ATP and NADPH
An organism that makes its own food
a lower-energy molecule that can be converted into ATP by the addition of a phosphate group
All the water at and near the surface of the earth, 97% of which is in oceans
A sequence of electron carrier molecules (membrane proteins) that shuttle electrons during the redox reactions that release energy used to make ATP.
Process that requires oxygen
main energy source that cells use for most of their work
the breakdown of glucose by enzymes, releasing energy and pyruvic acid.
A substance produced in a chemical reaction
Powerhouse of the cell, organelle that is the site of ATP (energy) production
An organelle found in plant and algae cells where photosynthesis occurs
Verticales
A chemical substance that is present at the start of a chemical reaction
An organism that breaks down wastes and dead organisms
Anything that has mass and takes up space
the process by which cells use oxygen to produce energy from food
Process by which cells release energy in the absence of oxygen
Process that doesn't require oxygen
the solid part of the earth consisting of the crust and outer mantle
An organism that cannot make its own food.
Conversion of light energy from the sun into chemical energy.
second stage of cellular respiration, in which pyruvic acid is broken down into carbon dioxide in a series of energy-extracting reactions
A green pigment found in the chloroplasts of plants, algae, and some bacteria
P 15
the part of Earth where life exists