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| obtain nutrients and energy by feeding on organic compounds from other organisms. |
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| composed of several or many cells. |
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| animal that has no backbone. |
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| an organism that uses organic waste as a food source, as certain insects. |
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| aquatic animal that strains tiny floating plants and animals from the water around it |
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| attached to a single spot |
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| Not attached to a single spot |
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| body plan in which a single, imaginary line can divide the body into two equal halves |
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| characterized by body parts that repeat around the center of the body |
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| the concentration of nerve cells and sense organs at the anterior end of the body |
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| fluid filled space that lies between digestive tract and body wall |
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| scientific study of interactions among organisms and their environment, or surroundings. |
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| group of organisms so similar to one another that they can breed and produce fertile offspring |
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| groups of individuals that belong to the same species and live in the same area |
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| assemblages of different populations that live together in a defined area |
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| a collection of all the organisms that live in a particular place together with their nonliving or physical environment |
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| group of ecosystems that have the same climate and similar dominant communities. |
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| an organism, usually an animal, that feeds on plants or other animals |
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| series of steps in which organisms transfer energy by eating and being eaten |
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| when the feeding relationships among the various organisms is an ecosystem form a network of complex interactions |
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| the area where an organism lives |
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| nonliving factors (temperature, precipitation, sunlight, etc) |
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| living cast of characters with which an organism might interact with |
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| full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions |
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| an organism captures and feeds on another organism |
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a relationship in which two organisms live closely together
3 classes of symbiosis:
mutalism, commensalism, parasitism |
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| both species benefit from the relationship |
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| one member of the association benefits and the other is neither helped nor harmed |
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| one organism lives on or inside another organism and harms it |
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| specialized cells that use flagella to move a steady current of water through the sponge |
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| a large hole at the top of the sponge |
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| stinging cell (located along tentacles) |
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| poison-filled stinging structure with dart |
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| cylindrical body with tentacles, mouth points upward, and sessile |
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| Motile, bell-shaped body, mouth on bottom |
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| cells that determine direction of gravity |
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| Heterotrophic, multicellular, and eukaryotic cells |
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| What does the biosphere contain? |
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| contains combined portions of the planet in which all of life exists, including land, water, and air |
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| The levels of organization |
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| Individuality, population, community, ecosystem, biome, and biosphere |
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| What 2 groups are animals divided into? |
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| Invertebrates and vertebrates |
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| Respiration: What goes in and what goes out? |
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| take in oxygen, give off carbon dioxide |
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| What 2 groups are animals divided into? |
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| Invertebrates and vertebrates |
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| Diffusion of material through cells |
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| elimination of waste (especially ammonia) |
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| nerve cell arrangement differs from animal to animal (Ex: receptors and bilateral symmetry) |
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| most reproduce sexually or asexually |
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| Some are sessile or motile |
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