1. How will you classify animals according to the food they eat?
2. List four characteristic of reptiles?
3. How do fish exchange gases?
4. What happens to the body temperature of a fish when the temperature of water drops?
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Answers
Answer:
1 Three different types of animals exist: herbivores, omnivores, and carnivores. Herbivores are animals that eat only plants. Carnivores are animals that eat only meat. Omnivores are animals that eat both plants and meat.
2...Traits of Reptiles and Amphibians
Reptiles are vertebrates. They have backbones.
Their bodies are completely covered with scales.
They are cold-blooded.
Reptiles produce shelled eggs or bear live young.
All species fertilize eggs internally.
All species of reptiles have at least one lung.
3 Fish exchange gases by pulling oxygen-rich water through their mouths and pumping it over their gills. In some fish, capillary blood flows in the opposite direction to the water, causing counter-current exchange. The gills push the oxygen-poor water out through openings in the sides of the pharynx.
4 Its body temperature drops to that of its surroundings, and the heartbeat and breathing are slowed down greatly. If the temperature drops too low, the animal will freeze and never awaken from torpor. ... The same fish in 60° F water will have a body temperature near 60° F.
Answer:
1. Herbivores are animals which are nutritionally dependent on plants and fruits. Carnivores are animals for food which rely on other animals. Omnivores species are those who eat plants as well as animals. Parasites are a too complicated group of living organisms inside host cells. They are smaller than their host organism, and they propagate faster, causing the host a more significant injury. The scavengers are considered an organism that feeds on dead and decaying biomass.
2. Reptiles are vertebrates. They have backbones.
Their bodies are completely covered with scales.
They are cold-blooded.
Reptiles produce shelled eggs or bear live young.
All species fertilize eggs internally.
3. Gills are tissues made up of feathery structures called gill filaments providing a large surface area for exchange of gases. Fish take in oxygen-rich water via their mouths and pump it over their gills. When water moves over the gill filaments, the blood within the capillary network takes up the dissolved oxygen.
4. Since, they are cold-blooded, there body temperature drops too.