All of the following adaptations allow for reproduction on land except Question 20 options:

external fertilization.

eggs with sufficient food supply.

desiccation-resistant eggs.

amniotic eggs.

external fertilization

Explanation:

External fertilization cannot happen on land since it needs a medium for the fertilization to be able to take place, but land cannot provide the medium.

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frogs. the lower the ph the higher the acid content. frogs have the highest tolerance in this scenario.

so whats the answer