Question

1. is a bat a bird or a mammal? explain.
2. is a dolphin a fish, amphibian, or a mammal? explain.
3. what is the difference between cold - blooded and warm - blooded animals?

Explanation:

• Question 22: Bats are mammals. They give birth to live young (not lay eggs like birds), have fur or hair, and nurse their young with milk.
• Question 23: Dolphins are mammals. They give birth to live young, have lungs and breathe air (unlike fish which use gills), and nurse their young with milk.
• Question 24: Cold - blooded animals (ectotherms) rely on external sources of heat to regulate their body temperature. Their body temperature changes with the environment. Warm - blooded animals (endotherms) can internally regulate their body temperature, maintaining it relatively constant regardless of the external environment.

Answer:

1. A bat is a mammal.
2. A dolphin is a mammal.
3. Cold - blooded animals rely on external heat; warm - blooded animals internally regulate temperature.