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In which group of animals does external fertilization primarily occur?

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Question: In which group of animals does external fertilization primarily occur?

Options:

  1. Mammals
  2. Birds
  3. Amphibians
  4. Reptiles

Correct Answer: Amphibians

Solution: 

Amphibians typically undergo external fertilization, where eggs are fertilized outside the female\'s body.

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.
  • External Fertilization – A reproductive process where fertilization occurs outside the female's body, commonly seen in certain animal groups.
  • Amphibians – A class of animals that typically undergo external fertilization, laying eggs in water where fertilization occurs.
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