Term
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Definition
| Animals that lack a backbone |
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Definition
| Animals that possesses a backbone |
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Term
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Definition
| An organism possesses spherical symmetry if it can be cut into two identical halves by any cut that runs through the organisms center |
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Definition
| An organism posses radial symmetry if it can be cut into two halves by any longitudinal cut through its center |
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Definition
| An organism possesses bolateral symmetry if it can only be cut into two indentical halves by a single longitudinal cut along its center which divides it into right and left halves |
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Term
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Definition
| An outer layer of cells designed to provide protection |
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Definition
| The jelly-like substance that seperates the epidermis from the inner cells in a sponge |
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Definition
| Flagellated cells that pump water into a sponge |
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Definition
| Cells in a sponge that perform digestion and transport functions |
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Term
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Definition
| a cluster of cells encased in a hard, spicule-reinforced shell |
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Term
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Definition
| A sessile, tubular cindarian with a mouth and tentacles at one end and a basal disk at the other |
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Definition
| A free-swimming cindarian with a bell-shaped body and tentacles |
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Term
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Definition
| Animal tissue consisting of one or more layers of cells taht have only one free surface, because the other surface adheres to a membrane or other substances |
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Term
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Definition
| The jelly-like substance that separates the epithelial cells in a cindarian |
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Definition
| Small capsules that contain a toxin which is injected into prey or predators |
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Definition
| The organ that prodices sperm |
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Term
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Definition
| The organ that produces eggs |
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Term
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Definition
| The end of an animal that contains its head |
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Definition
| The end of an animal that contains the tail |
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Definition
| A system designed to transport food and other necessart substances throughout a creature's body |
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Term
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Definition
| A system of sensitive cells that respond to stimuli such as sound, touch, and taste |
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Term
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Definition
| Masses of nerve cell bodies |
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Term
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Definition
| Possessing both the male and the female reproductive organs |
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Term
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Definition
| The ability to re-grow a missing part of the body |
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Term
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Definition
| A sheath of tissure that encloses the vital organs of a mollusk, makes the mollusk's shell, and performs respiration |
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Term
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Definition
| A tough, multilayered structure secreted by the mantle |
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Term
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Definition
| A hump that contains a mollusk's heart, digestive, and excretory organs |
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Term
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Definition
| A muscular organ that is used for locomotion and takes a variety of forms depending on the animal |
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Term
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Definition
| A organ covered with teeth that mollusks use to scrape food into their mouths |
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Term
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Definition
| An organism with a single shell |
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Term
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Definition
| An organism with two shells |
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Term
| Do the vast majority of animals have backbones? |
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Definition
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Term
| Determine the symmetry of the following organisms |
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Definition
| p. 370 Bilateral, Radial, Spherical |
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Term
| How do sponges get their prey? |
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Definition
| constantly pumping water into itself |
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Term
| If a sponge is soft, does it contain spicules or spongin? What purpose do these substances serve in a sponge? |
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Definition
| Spongin, provides framework (support) |
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Term
| What is the predominant mode of asexual reproduction in a sponge? |
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Definition
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Term
| What roles do amebocytes play in the anatomy of a sponge? |
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Definition
| digestion and transport nutrients, carry waste, bring gases to the cells, & form the spicules or spongin |
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Term
| When does a sponge produce gemmules? |
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Definition
| to protect from freezing temperatures |
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Term
| What is the difference between the nematocytes of a hydra and those of a sea anemone? |
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Definition
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Term
| Why do cnidarians not need respiratory or excretory systems? |
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Definition
| gases and waste can be directly exchanged with the surroundings through the body itself |
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Term
| Some biology books say that jellyfish live "dual lives." Why? |
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Definition
| because they are polyps and medusas |
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Term
| If a jellyfish reproduces sexually, what form is it in? |
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Definition
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Term
| What is another name for a coral colony? |
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Definition
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Term
| Name all of the structures in the diagram below. |
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Definition
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Term
| What benefits do earthworms give plants in the soil that they inhabit? |
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Definition
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Term
| If you pick up two earthworms and the first feels very slimy near the clitellum and the second does not, what can you conclude about the first earthworm? |
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Definition
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Term
| What similarities exist between the hydra's sexual reproduction and the earthworm's? What differences exist? |
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Definition
| produces both eggs and sperm, worm cannot mate with itself |
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Term
| What will happen to an earthworm if its cuticle gets dry? |
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Definition
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Term
| Why don't planarians need circulatory systems? |
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Definition
| because the intestine branches extend throughout most of the body |
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Term
| If a flatworm has no complex nervous or digestive systems, it is most likely free-living or parasitic? |
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Definition
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Term
| What is the main mode of asexual reproduction in a planarian? |
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Definition
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Term
| Place each organism in one of the following phyla: Porifera, Cnidaria, Annelida, Mollusca, Platyhelminthes |
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Definition
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