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Biology OYO
Module 11 - OYO
Question | Answer |
---|---|
11.1 Identify the symmetry (if any) possessed by these animals: a. Manta Ray b. Sponge c. Jellyfish d. Coccolithophore | a. Bilateral b. None c. Radial d. Spherical |
11.2 One biology book calls sponges "tireless, natural pumps." Why is this a good description of sponges? | Because they are constantly pumping and filtering the water for food. |
11.3 If a sponge has plenty of food but cannot distribute it to all of its cells, what is the sponge missing? | Amoebocytes. |
11.4 A sponge feels hard and prickly. Does it contain spicules or spongin? | Spicules. |
11.5 An organism has a mouth, tentacles, and a gut. It also has bilateral symmetry. Can it be placed in phylum Cnidaria? | Yes. |
11.6 If a clownfish were to brush up against a hydra, would the hydra release its nematocysts into the clownfish. | No. |
11.7 A lot of animals need some sort of respiratory and excretion systems. Why don't cnidarions need these? | Because gases and excretion go through their skin. |
11.8 If a jellyfish reproduces asexually, is it in polyp form or medusa form? | Medusa. |
11.9 If an earthworm's mouth if fully functional but it cannot ingest soil, what organ is malfunctioning? | Pharynx. |
11.10 What process will stop if the earthworm's cuticle dries up? | The exchange of gases with the surroundings. |
11.11 In a dissected earthworm, you see a nerve chord with ganglia at each segment right next to a long blood vessel. Is blood flowing towards the anterior or the posterior in the blood vessel? | Posterior. |
11.12 An earthworm's seminal vesicle is empty but its oviducts are full. Has the earthworm mated yet? | Yes. |
11.13 Compare the digestion of a planarion with a fungus. What are the similarities? | They both digest their food before taking it in. |
11.14 A flatworm has very complex digestive and nervous systems. Is this flatworm likely to be parasitic? Why or why not? | No. Because if it feeds on a host it doesn't need much of a digestive system. |
11.15 If you were to observe a sidewalk that a snail had just traveled across, what would you expect to find? | A thin layer of slime. |
11.16 Clams often burrow in the sand. What organ do you think they use when they do this? | Foot. |