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Why do animals like fish and frogs lay hundreds or even thousands of eggs at a time, while other animals lay only a few? What might be the advantages and disadvantages of laying so many eggs?
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Key Points
Laying many eggs helps a few survive, but most are lost.
Key Points / Good Practices
- Fish and frogs leave their eggs in water without much care.
- Many eggs are eaten by predators or do not survive.
- So laying thousands means at least a few will grow up.
- Advantage: it improves the chance some young survive.
- Disadvantage: most eggs are wasted and a lot of energy is spent.
- Animals that protect their young can lay only a few.
Many eggs raise survival chances when there is no parental care.
