| External Fertilization | Internal Fertilization |
|---|---|
| $(1)$ Syngamy occurs in an external medium (e.g.,water). | $(1)$ Syngamy takes place inside the body of the organism. |
| $(2)$ $A$ large number of offspring are produced. | $(2)$ The number of offspring produced is limited. |
| $(3)$ The chances of survival of the young ones are lower due to predators and environmental factors. | $(3)$ The chances of survival of the young ones are higher as they are protected inside the mother's body. |
| $(4)$ It requires an external medium like water for the male gametes to reach the female egg. | $(4)$ Male gametes are motile and reach the female egg within the reproductive tract. |
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