| A | B |
|---|
| cellular respiration | series of chemical reactions that convert the energy in food molecules into ATP |
| energy | usable power |
| photosynthesis | series of chemical reactions that convert light energy, water, and carbon dioxide into glucose and give off oxygen |
| photoperiodism | plant’s response to the number of hours of darkness in its environment |
| plant hormone | substance that acts as a chemical messenger within plants |
| stimulus | any change in the environment that causes organisms to respond |
| tropism | response that results in plant growth toward or away from a stimulus |
| zygote | the cell that forms when a sperm cell fertilizes an egg cell |
| asexual reproduction | production of offspring by one parent without meiosis and fertilization |
| sexual reproduction | production of offspring from the combination of genetic materials from two cells (male & female) |
| diploid | describes a cell that has pairs of chromosomes |
| haploid | describes a cell that has only one chromosome from each pair |
| meiosis | process in which one diploid cell divides to make haploid sex cells |
