Chapter 4: Problem 43

For each of the following questions, four choices have been provided. Select the correct alternatives. In which of the following organisms, fertilization is not internal? (a) Humans (b) Frogs (c) Hens (d) Dogs

Short Answer

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(a) Humans (b) Frogs (c) Hens (d) Dogs Answer: (b) Frogs

Step by step solution

Identify the two types of fertilization

Fertilization can either occur internally or externally. Internal fertilization is when the sperm fuses with the egg within the body of the female, while external fertilization is when both eggs and sperm are released outside the body, usually into the water, and fertilization occurs there.

Understand the reproductive strategies of each organism

Now, let's discuss each organisms' fertilization type: (a) Humans: Mammals like humans have internal fertilization, where the sperm meets the egg inside the female's body. (b) Frogs: Frogs are amphibians, and most amphibians typically perform external fertilization. Female frogs lay their eggs in water, and the male frogs release their sperm into the water to fertilize the eggs. (c) Hens: Birds like hens have internal fertilization, where sperm delivered by the male bird fertilizes the egg inside the female bird. (d) Dogs: Dogs, as mammals, also have internal fertilization. The sperm meets the egg inside the female dog's body.

Identify the correct answer

From the information in Step 2, we can determine that the organism with external fertilization is the frog. Hence, the correct answer is: (b) Frogs

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For each of the following questions, four choices have been provided. Select the correct alternatives. In which of the following organisms, fertilization is not internal? (a) Humans (b) Frogs (c) Hens (d) Dogs

Short Answer

Step by step solution

Identify the two types of fertilization

Understand the reproductive strategies of each organism

Identify the correct answer

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