1. Why do herbivores and carnivores have different types of teeth

2. Why is breathing necessary?

Describe how air reaches inside the body of an insect.

• How do fish breathe under water?

Snakes do not have legs. How do they move?

How are fins useful to a fish?

What is migration? Explain with an example.

Exclaimer: Be sure to change the wording a bit on your homework. Some of this is from doing a bit of google searching.

1. The herbivores and carnivores have different teeth because both of the types eat different foods. Herbivores have flat teeth so that they can process and chew the herbs easily while carnivores have sharp teeth that is used for eating meat and piercing the meat easily.

2. Body cells need it for energy and growth. Without oxygen, the body's cells would die.

3. Insects do not have lungs to breath, so they do respiration through their tracheae. Oxygen enters the body of the insect through spiracles and it reaches all the cells of the body by passing through network of trachea and tracheoles. Every cell gets oxygen directly.

4. The fish's gills take in the oxygen contained in the water.

5. Since snakes don't have legs they use their scales and muscles to move.

6. They use fins to swim. They use their fins to change direction, move forward, stopping, staying etc.

7. Seasonal movement of animals from one place to another. Ex: Monarch Butterfly migrates each summer and autumn to and from overwintering sites on the West Coast of California or mountainous sites in Central Mexico.