| A | B |
|---|
| Invertebrate | An animal that does not have a backbone |
| Parasite | An organism that lives on or in another organism, called a host, and causes harm to that organism |
| Host | A living thing that supports a parasite |
| Mollusk | An animal with a soft body that is not divided into segments |
| Arthropod | An animal with an outer skeleton, jointed appendages, and a body divided into separate parts, called segments |
| Appendage | A part that extends out from the body, such as a wing, a leg, an arm, or a claw |
| Crustacean | An arthropod with two body segments and five pairs of legs |
| Vertebrate | An animal with a backbone |
| Cold-blooded | Having a body temperature that changes with the environment |
| Warm-blooded | Having a body temperature that stays fairly constant |
| Amphibian | A cold-blooded land vertebrate, usually with four legs and clawed toes |
| Migrate | To move long distances each year to reach warm areas and better feeding grounds |
| Mammal | A warm-blooded vertebrate that has hair on its body; the mother's body makes milk to feed its young |
| Seed | The part of a seed plant from which a new plant can grow |
| Root | The part of a plant below the surface of the soil; used to hold the plant in place, store extra food, and soak up water and minerals from the soil |
| Stem | The upright part of a plant; used to carry food and water and hold a plant up so its leaves can get sunlight |
| Leaf | The food-making part of the plant |
| Photosynthesis | The process that plants use to make food in th eform of sugar |
| Pistil | The female part of a flower |
| Egg cell | A female sex cell |
| Stamen | The male part of a flower |
| Pollen | The light, powdery dust in stamens that contains the male sex cells |
| Sperm cell | A male sex cell |
| Petal | One of the colorful outer parts of a flower; it attracts insects |
| Pollination | The process of transferring pollen from the stamen of a flower to the pistil of the same or a different flower |
| Fertilization | The process of a sperm cell and an egg cell joining |
| Germination | The process by which a tiny new plant breaks through the hard seed coat that is protecting it |
| Fruit | The part of a plant that holds the seeds |
