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Description
Flashcards by Melinda Colby, updated more than 1 year ago
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Created by Melinda Colby
almost 9 years ago
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| Question | Answer |
| What distinguishes sponges from other invertebrates? | Their cells are not organized into tissues |
| What distinguishes sponges? | **They are non-symetrical **They lack organization into tissues and organs, **They posses cells that are capable of recognizing other sponge cells |
| What are Collar Cells? | Draw water into the body of the sponge |
| What are spicules? | Hard spike-like structures in the wall of the sponge |
| Describe the body of an Adult Sponge | Have body walls with many pores |
| What provides skeletal support in sponges? | **Spicules of Calcium Carbonate and silicon dioxide, **fibers called spogin |
| How do sponges obtain food? | By filtering small organisims from the water |
| In sponges, what draws water through them? | collar cells |
| Why is Hermaphoridism advantages in Sponges? | Because they are sessile and cannot move from where they are anchored at. |
| What is the role of Gemmules in sponges | Are necessary for one form of asexual reproduction |
| Where does water leave the interior of the sponge? | Osculum |
| What is the name of the cells that move through out the sponges body to deliver food the organisims cells? | Amoebocytes |
| Hermaphorditic Organisims produce both what?? | Sperm and Egg |
| Collar Cell is to water (collar cell: water) as ??? | Amoebocyte is to nutrients and waste (amoebocyte : nutrients and wastes) |
| What are the two disticnt life stages of cnidarians? | The polyp and medusa |
| Some fresh water sponges reproduce by gemmules, how do hermaphordites reproduce? | Produce both sperm and egg. |
| Which organisim produces nematocysts to capture its prey? | Sea anemone. |
| What are the ways in which sponges reproduce? | **By the budding of new sponges from the parent **By breaking off of the original parent into fragments that each become a new sponge **sexually using sperm and egg |
| What is true of Nematocysts? | can spear a cnidarians prey |
| What is the outer cell layer of the cnidarian called? | epidermis |
| The inner layer of the cnidarian is specialized for? | Digestion |
| What charactieristics is only associated with cnidarians? | cnidocytes specialized for defense and capturing prey |
| The phylum Cnidaria includes: | Jellyfish sea anemones corals |
| Why makes a Hydra unique among hydrozoans? | It has no medusa stage |
| Which of the following is not sessile as an adult? Sponge, coral, sea anemone, or Portuguese man of war | Portuguese man of war |
| What is the body form of a sea anemone? | Polyps |
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