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Alexis Young1
Blume Ch 12.3
| Question | Answer |
|---|---|
| What are invertebrates with soft bodies, bilateral symmetry, and three tissue layers organized into organs and organ systems? | Worm |
| What are usually parasites, but few are free-living organisms. | Flatworms |
| What are free-living flatworms that feed on small organisms or dead bodies of larger organisms? | Planarians |
| Where do most planarians live? | Under rocks, on plant material, or in freshwater water |
| How can planarians reproduce? | Sexually or Asexually |
| What are parasites with complex life cycle that requires more than one host? | Flukes |
| How do flukes reproduce? | sexually |
| Flukes cause _________ a potentially fatal blood disease, in humans. | Schistosomiasis |
| What are parasites that live in the intestines of a host animal? | Tapeworms |
| Tapeworms absorb food digested by ______. | Host |
| Tapeworms produce what that contains sperm and eggs? | Segments |
| What were probably the first animals to have bilateral symmetry, senses and nerves in the head region, and a third tissue layer that develops into organs and systems? | Flatworms |
| What are roundworms also called? | Nematodes |
| Many roundworms are plant and animal parasites; roundworms can cause _________ in humans. | trichinosis |
| Worms are divided into what two types? | flatworms and roundworms |
| T or F: All worms are invertebrates with four tissue layers. | False |
| What are types of parasite flatworms? | Tapeworms and flukes |
| Planarians are _______ flatworms. | free-living |
| How are some roundworms beneficial? | They kill pests |
| Roundworms are essential in developing what? | Healthy Soil |
| The fertilized eggs pass out of the host's body and can ______ another host. | enter |
| Roundworms appear _____ in animal evolution, but scientists are not sure how they evolved. | early |
| Roundworms were the first group of animals to evolve a digestive system with a _______ and an ______. | mouth and anus |
| ________ attack dogs, are parasites. | Heartworms |
| How does a tapeworm eat? | Tapeworms attach themselves in a host's intestine & asrobe food the host has digested. |
| What is the most widespread human disease caused by flukes? | Schistosomiasis |
| List three ways roundworms are helpful to humans. | 1. They help fight insects 2. May be used to kill ticks that cause Lyme disease 3. Help provide healthy soil |
Created by:
ayoung1
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