ANIMAL REPRODUCTION AND DEVELOPMENT
SEXUAL REPRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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birds and turtles
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birds and fish
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fish and frogs
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snakes and turtles
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Detailed explanation-1: -All the fish and amphibians fertilize externally.
Detailed explanation-2: -In most species of frogs, fertilization is external. The male frog grabs the female’s back and fertilizes the eggs as the female frog releases them (Figure 2.2B).
Detailed explanation-3: -Aquatic animals usually release their gametes directly into the outer environment i.e., water. The fusion of gametes takes place outside the body so it is called as external fertilization. It mostly takes place in fishes and amphibians.
Detailed explanation-4: -Fish. Salmon, cod, trout, and char are all examples of the fish that externally fertilize. The females release roe (an egg mass) and the males release milt (seminal fluid containing sperm) into the water, where they diffuse together and fertilize.
Detailed explanation-5: -Internal fertilization refers to fertilization that occurs within the female body. Fishes and frogs are both oviparous, which means they deposit eggs and fertilize them externally. This type of fertilization is external.