| A | B |
|---|
| amino acid | simple compound that is the building block of proteins |
| acid | solution with higher concentration of hydrogen ions than hydroxide ions. |
| cell theory | a theory that all living things are composed of one or more cells |
| ionic bond | force of attraction between ions |
| stroma | fluid part of the chloroplast containing molecules used to synthesize sugars |
| middle lamella | in plants,the secondary wall, which lies inside the primary wall. |
| potential energy | stored energy or energyof position |
| molecule | combination of two or more atoms joined together by a covalent bound |
| anaerobic | process that occurs in the absence of oxygen |
| free energy | energy capable to biological work |
| vesicle | small substance-containing sac formed from the plasma membrane in the process of endocytosis |
| endocytosis | process by which the plasma membrane of a cell surrounds material, and takes in the material from its enviroment |
| ATP | adenosine triphosphate |
| element | substance composed of only one type of atom |
| exergonic | chemical reaction that releases free energy |
| kinetic energy | energy of motion |
| wavelength | a measure of radiant energy calculated by the distance from one wave crest to the next |
| phagocytosis | process by which the cell takes in solid chunks of material |
| fertilization | process of fusion of two haplod sex cells to form a zygote |
| diploid | cells having two of each chromosome |
