Question

1(a). External fertilization occurs in
(i) porpoise
(ii) Newt
(iii) trout​

Answer 1

Answer:

Reptiles and gymnosperm

Answer 2

Required answer:-

‎ ‎ ‎ ‎ ‎ ‎ ‎External fertilization occurs in trout.

Explanation:-

‎ ‎ ‎ ‎ ‎ ‎ First of let's know what does the term external fertilization means. According to the place of fertilization, whether inside or outside the body, it is classified into two types: $\:$

‎ ‎ ‎1. Internal fertilization

• Takes place inside the female body.
• Male gametes are transferred to the body of female.
• For example, humans, cows, dogs, hens, etc.

‎ ‎ ‎2. External fertilization

• Fertilization takes place outside the female body.
• Usually takes place in the aquatic medium where gametes are released into the water.
• For example, frog, fish, etc.

In the question, we are given three choices and are asked to find out the organism which undergoes external fertilization. Three options are: Porpoise, Newt and Trout.

Internal fertilization occurs in porpoise and newt, whereas trout is a freshwater fish which undergoes external fertilization (gametes are released into water). Hence, it is the appropriate answer.

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