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Select the incorrect statement about external fertilization.
- a)Organisms showing external fertilisation produce a large number of male gametes only.
- b)External fertilisation is very uncertain and requires synchony between release of male and female gametes.
- c)It is replaced by internal fertilisation in higher organisms as it wastes energy and requires external medium like water.
- d)It occurs in most of the fishes and amphibians.
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
Select the incorrect statement about external fertilization.a)Organism...
The incorrect statement about external fertilization is:
- Organisms showing external fertilization produce a large number of male gametes only.
This statement is incorrect because in external fertilization, both male and female gametes are released into the external medium, such as water, where fertilization takes place. Therefore, statement 1 is incorrect.
External fertilization is a reproductive strategy where fertilization takes place outside the body of the organism, usually in a water medium. It is true that external fertilization requires synchronization between the release of male and female gametes, and is more uncertain compared to internal fertilization, which occurs inside the body of the organism.
It is also true that external fertilization is common in many fish and amphibian species, but it is not always replaced by internal fertilization in higher organisms. Some higher organisms, such as some reptiles, birds, and monotremes (egg-laying mammals), still use external fertilization as their primary mode of reproduction.
Therefore, the correct answer is option 1: Organisms showing external fertilization produce a large number of male gametes only.
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Select the incorrect statement about external fertilization.a)Organism...
Incorrect Statement about External Fertilization
External fertilization is a mode of fertilization in which the fusion of gametes occurs outside the body of the organism. It is a common mode of fertilization in aquatic organisms such as fish, amphibians, and some invertebrates. The statement that is incorrect about external fertilization is:
Organisms showing external fertilization produce a large number of male gametes only.
Explanation
The correct statement is that organisms showing external fertilization produce a large number of gametes (both male and female). This is because external fertilization is a very uncertain mode of fertilization, and the probability of the gametes meeting and fertilizing is low. Hence, to increase the chances of fertilization, organisms release a large number of gametes into the external medium. Some of the gametes may not even reach the destination due to water currents or other environmental factors. Therefore, producing a large number of gametes increases the chances of fertilization.
Other Statements about External Fertilization
- External fertilization is very uncertain and requires synchrony between the release of male and female gametes. This statement is correct because if the gametes are not released simultaneously, the probability of fertilization decreases.
- It is replaced by internal fertilization in higher organisms as it wastes energy and requires an external medium like water. This statement is also correct because internal fertilization is a more efficient mode of fertilization as it directly transfers the gametes from the male to the female reproductive system, reducing the chances of gamete wastage. It also allows for the development of fertilized eggs in a protected environment inside the female body.
- It occurs in most of the fishes and amphibians. This statement is correct because most fish and amphibians reproduce by external fertilization. However, some fish and amphibians have evolved to use internal fertilization as well.
External fertilization is a mode of fertilization in which the fusion of gametes occurs outside the body of the organism. It is a common mode of fertilization in aquatic organisms such as fish, amphibians, and some invertebrates. The statement that is incorrect about external fertilization is:
Organisms showing external fertilization produce a large number of male gametes only.
Explanation
The correct statement is that organisms showing external fertilization produce a large number of gametes (both male and female). This is because external fertilization is a very uncertain mode of fertilization, and the probability of the gametes meeting and fertilizing is low. Hence, to increase the chances of fertilization, organisms release a large number of gametes into the external medium. Some of the gametes may not even reach the destination due to water currents or other environmental factors. Therefore, producing a large number of gametes increases the chances of fertilization.
Other Statements about External Fertilization
- External fertilization is very uncertain and requires synchrony between the release of male and female gametes. This statement is correct because if the gametes are not released simultaneously, the probability of fertilization decreases.
- It is replaced by internal fertilization in higher organisms as it wastes energy and requires an external medium like water. This statement is also correct because internal fertilization is a more efficient mode of fertilization as it directly transfers the gametes from the male to the female reproductive system, reducing the chances of gamete wastage. It also allows for the development of fertilized eggs in a protected environment inside the female body.
- It occurs in most of the fishes and amphibians. This statement is correct because most fish and amphibians reproduce by external fertilization. However, some fish and amphibians have evolved to use internal fertilization as well.
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Select the incorrect statement about external fertilization.a)Organisms showing external fertilisation produce a large number of male gametes only.b)External fertilisation is very uncertain and requires synchony between release of male and female gametes.c)It is replaced by internal fertilisation in higher organisms as it wastes energy and requires external medium like water.d)It occurs in most of the fishes and amphibians.Correct answer is option 'A'. Can you explain this answer?
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Select the incorrect statement about external fertilization.a)Organisms showing external fertilisation produce a large number of male gametes only.b)External fertilisation is very uncertain and requires synchony between release of male and female gametes.c)It is replaced by internal fertilisation in higher organisms as it wastes energy and requires external medium like water.d)It occurs in most of the fishes and amphibians.Correct answer is option 'A'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Select the incorrect statement about external fertilization.a)Organisms showing external fertilisation produce a large number of male gametes only.b)External fertilisation is very uncertain and requires synchony between release of male and female gametes.c)It is replaced by internal fertilisation in higher organisms as it wastes energy and requires external medium like water.d)It occurs in most of the fishes and amphibians.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Select the incorrect statement about external fertilization.a)Organisms showing external fertilisation produce a large number of male gametes only.b)External fertilisation is very uncertain and requires synchony between release of male and female gametes.c)It is replaced by internal fertilisation in higher organisms as it wastes energy and requires external medium like water.d)It occurs in most of the fishes and amphibians.Correct answer is option 'A'. Can you explain this answer?.
Select the incorrect statement about external fertilization.a)Organisms showing external fertilisation produce a large number of male gametes only.b)External fertilisation is very uncertain and requires synchony between release of male and female gametes.c)It is replaced by internal fertilisation in higher organisms as it wastes energy and requires external medium like water.d)It occurs in most of the fishes and amphibians.Correct answer is option 'A'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Select the incorrect statement about external fertilization.a)Organisms showing external fertilisation produce a large number of male gametes only.b)External fertilisation is very uncertain and requires synchony between release of male and female gametes.c)It is replaced by internal fertilisation in higher organisms as it wastes energy and requires external medium like water.d)It occurs in most of the fishes and amphibians.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Select the incorrect statement about external fertilization.a)Organisms showing external fertilisation produce a large number of male gametes only.b)External fertilisation is very uncertain and requires synchony between release of male and female gametes.c)It is replaced by internal fertilisation in higher organisms as it wastes energy and requires external medium like water.d)It occurs in most of the fishes and amphibians.Correct answer is option 'A'. Can you explain this answer?.
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