In which group of animals does external fertilization primarily occur?

Practice Questions

Q1
In which group of animals does external fertilization primarily occur?
  1. Mammals
  2. Birds
  3. Amphibians
  4. Reptiles

Questions & Step-by-Step Solutions

In which group of animals does external fertilization primarily occur?
  • Step 1: Understand what external fertilization means. It is when the male fertilizes the female's eggs outside of her body.
  • Step 2: Identify the groups of animals that commonly use external fertilization.
  • Step 3: Recognize that amphibians, such as frogs and toads, are a primary group that uses external fertilization.
  • Step 4: Note that in amphibians, the female lays eggs in water, and the male releases sperm over the eggs to fertilize them.
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