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Life Science
Ch. 15 Q
| Question | Answer |
|---|---|
| What is the difference between cartilage and bones? | Cartilage is softer and more flexible than bone. |
| What type of skeleton do the organisms from Chordata have? What does that mean? | Chordates have an endoskeleton. That means the skeleton is on the inside of the animal. |
| True or False? All organisms from Chordata have well-developed tissues and organ systems. | True. |
| What is the difference between endothermic and ectothermic organisms? | Endothermic organisms perform more metabolic reactions than ectothermic ones do. As a result, endotherms produce their own body heat, but ectotherms cannot. |
| Which classes of Chordata are ectothermic and which are endothermic? | The classes Chondrichthyes, Osteichthyes, Amphibia, and Reptilia are all composed of ectothermic organisms. Aves and Mammalia are the only two classes of endothermic organisms. |
| Where does gas exchange take place? | There are a couple of potentially correct answers for this question. First, gas exchange occurs in capillaries. Also, gas exchange takes place in tissues and the lungs/gills. |
| What happens to the blood in the capillaries of the lungs? What happens in the capillaries of the tissues? | In the lung capillaries, the blood releases carbon dioxide into the air within the lungs. In addition, oxygen is absorbed into the blood from the air in the lungs. Therefore, blood in the lung capillaries becomes oxygenated. |
| _______________ carry blood to the heart and ________________ carry blood away from the heart. | Veins carry blood to the heart and arteries carry blood away from the heart. |
| Describe a one-loop circulatory system. | Deoxygenated blood is pumped out of the heart. The deoxygenated blood travels to the gills, where it is oxygenated. It continues through the gills to the tissues, where the oxygen is released from the blood into the tissues and carbon dioxide is absorbed |
| Describe a one-loop circulatory system. (continued) | from the tissues into the blood. The deoxygenated blood continues from the tissues and returns to the heart. |
| True or False? A two-loop circulatory system consists of one loop to the lungs-- the pulmonary loop--and one loop to the tissues--the systemic loop. | True. |
| What is external fertilization? | External fertilization is the type of fertilization that occurs when the eggs are fertilized outside of the female's body. |
| True or False? Sharks, rays, and seahorses are all species of cartilage fish. | False. Shards and rays are types of cartilage fish, but seahorses are a species of boney fish. |
| What is a lateral line? | A lateral line is a sensitive collection of nerve tissue that runs along the sides of a fish.It collects sensory information about the environment and sends the information to the fish's brain for processing. |
| True or False? Even though they have no covering, amphibian eggs are tough and resistant to drying out. | False. Amphibian eggs are very sensitive to dryness which is why they need to be laid in or near water. |
| What is the larval stage of a frog called? | The larval stage of a frog is called a tadpole. |
| What is special about the amniotic egg? | The amniotic egg has a tough, protective coating called a shell to protect the embryo. Secondly, the shell has holes in it for gas exchange to occur between the embryo and the environment. |
| What is special about the amniotic egg? | Finally, there are other tissues in the egg that remove wastes from and provide nutrition to the embryo. |
| What is a turtle shell made from? | A turtle's shell is made from ribs and covered by tough skin. |
| What is the difference between alligators and crocodiles? | Alligators have a short, broad snout and crocodiles have a longer thinner snout. Also, crocodiles have a notch in their upper jaw that the fourth tooth in the lower jaw fits into. |
| What is special about a snake's tongue? | A snakes' tongue is specialized to collect smell (odor) information as it flicks in and out of the snake's mouth. Odor chemicals (molecules) stick to the snake's tongue and are transferred to receptors in teh mouth, where theg are turther processed. |
| True or False? All reptiles have a three chambered heart. | False. Crocodiles and alligators have a four-chambered heart. All other reptiles have three-chambered hearts. |
Created by:
kaisnead
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