quarter 1 science exam
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43 terms
Terms | Definitions |
|---|---|
 photosynthesis | chemical process by which a plant produces food |
| chlorophyll | the green pigment that gives green plants its color |
| annual | plants that live for one season of growth |
| perennial | plants that continue to grow season after season |
| cephalothorax | body region formed by the joining of the head and thorax |
| Castings | produced by earthworms and enrich the soil |
| Setae | stiff hairlike bristles found on the body of spiders and earthworms |
| univalves | one-shelled mollusks such as snails |
| bivalves | two matching hinged shelled mollusks such as clams, oysters and scallops |
| coral polyp | invertebrate that builds a protective limestone cup at the base of its body |
| cell membrane | structure that surrounds and protects the cell |
| chromosomes | threadlike structures in a cell that determine the characteristics of the organism and how it runs |
| cytoplasm | jellylike fluid that fills the cell |
| nucleus | structure that directs the work of the cell |
| cones | produced by Conifers instead of flowers |
| pine tree | bears needles in bundles |
| maple tree | source of syrup and sugar |
| paper birch | tree known for its smooth bark that peels off in layers |
| oak tree | produces acorns |
| algae | smallest green plants |
| barnacle | a crustacean that cements itself to an object as a youth |
| brine shrimp | posses "gill-feet" and is often used as fish food |
| cleaner shrimp | searches for parasites on fish |
| crayfish | small freshwater lobster |
| hermit crab | a crab whose shell only covers the front part of its body |
| krill | favorite food of whales |
| pea crab | the smallest crab |
| pill bug | expels an offensive odor; often called a roly-poly |
| pistol shrimp | shrimp with a "stun gun" |
| spiny lobster | lobster without pincers |
| gastropod | uses a foot as if it were sliding on its stomach |
| sea star | has 5 or more rays with tube feet |
| gills | breathing organ of crustaceans |
| centipedes | has one pair of legs per segment and has one pair of legs close to the mouth that are poisonous |
| millipedes | defends itself with stink glands |
| exoskeleton | lacking in earthworms; prevents it from being classified as an arthropod |
| crustaceans | have 10 legs and 3 body regions |
| arachnids | examples include scorpions and tarantulas |
| crustaceans | examples include barnacles and crabs |
| insects | examples include ants and ladybird beetles |
| mollusks | examples include an octopus and clams |
| protozoan | examples include amoebas and paramecium |
| amoebas | has no definite shape; moves with pseudopods; uses pseudopods to engulf food; must live in water; some live in people or animals; some parasitic varieties cause diseases |
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