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Which of the following statements regarding ‘Speciation’ is/are correct?
- It is a process within evolution that leads to the formation of new and distinct species.
- Sympatric speciation occurs when a population of organisms becomes isolated from their main group due to geographical barriers.
- The main mechanisms resulting in allopatric speciation involve changes in the chromosomes of the organisms.
Select the correct answer using the code given below:
- a)1 only
- b)2 and 3 only
- c)1 and 3 only
- d)1, 2 and 3
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Which of the following statements regarding ‘Speciation’ i...
- Speciation is a process within evolution that leads to the formation of new, distinct species that are reproductively isolated from one another. So, statement (1) is correct.
- It involves the splitting of a single evolutionary lineage into two or more genetically independent lineages.
- New species form by two major mechanisms, namely sympatric speciation and allopatric speciation. Allopatric Speciation o The physical isolation of the biology population due to the extrinsic barrier is called allopatric speciation.
- Allopatric speciation occurs when a population of organisms becomes separated or isolated from their main group due to geographical barriers. So, statement (2) is not correct.
- Over time, the new groups of homogenous individuals become subjective to changes via natural selection due to pressure from differences in predators, climate, competitors and resources. Populations can become isolated for a variety of reasons. Sympatric Speciation
- The evolution of new species from one ancestral species by living in the same habitat is called sympatric speciation.
- This type of speciation happens in a population without geographic isolation.
- The main mechanisms resulting in sympatric speciation involve changes in the chromosomes of the organism. One way this happens is when there is a serious error that occurs during cell division resulting in more than one copy of a chromosome(s), or the loss of a chromosome(s), in one of the daughter cells. This condition is known as aneuploidy. So, statement (3) is not correct. Therefore, the correct answer is a.
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Most Upvoted Answer
Which of the following statements regarding ‘Speciation’ i...
Speciation
Speciation is a fundamental process in evolution that leads to the formation of new and distinct species. There are different mechanisms through which speciation can occur, such as allopatric and sympatric speciation.
Allopatric Speciation
- Allopatric speciation occurs when a population of organisms becomes isolated from their main group due to geographical barriers. This isolation leads to genetic divergence and eventually the formation of new species.
- The main mechanisms resulting in allopatric speciation involve changes in the chromosomes of the organisms.
Sympatric Speciation
- Sympatric speciation, on the other hand, occurs within the same geographic area. It involves the emergence of a new species without any physical isolation of the population.
- Sympatric speciation can be driven by various factors such as disruptive selection, polyploidy, or habitat differentiation.
Therefore, the correct statement regarding speciation is that it is a process within evolution that leads to the formation of new and distinct species. The statement about sympatric speciation involving geographical barriers and the main mechanisms resulting in allopatric speciation involving changes in chromosomes are not accurate, making option 'A' the correct answer.
Speciation is a fundamental process in evolution that leads to the formation of new and distinct species. There are different mechanisms through which speciation can occur, such as allopatric and sympatric speciation.
Allopatric Speciation
- Allopatric speciation occurs when a population of organisms becomes isolated from their main group due to geographical barriers. This isolation leads to genetic divergence and eventually the formation of new species.
- The main mechanisms resulting in allopatric speciation involve changes in the chromosomes of the organisms.
Sympatric Speciation
- Sympatric speciation, on the other hand, occurs within the same geographic area. It involves the emergence of a new species without any physical isolation of the population.
- Sympatric speciation can be driven by various factors such as disruptive selection, polyploidy, or habitat differentiation.
Therefore, the correct statement regarding speciation is that it is a process within evolution that leads to the formation of new and distinct species. The statement about sympatric speciation involving geographical barriers and the main mechanisms resulting in allopatric speciation involving changes in chromosomes are not accurate, making option 'A' the correct answer.
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Which of the following statements regarding ‘Speciation’ is/are correct? It is a process within evolution that leads to the formation of new and distinct species. Sympatric speciation occurs when a population of organisms becomes isolated from their main group due to geographical barriers. The main mechanisms resulting in allopatric speciation involve changes in the chromosomes of the organisms.Select the correct answer using the code given below:a)1 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer?
Question Description
Which of the following statements regarding ‘Speciation’ is/are correct? It is a process within evolution that leads to the formation of new and distinct species. Sympatric speciation occurs when a population of organisms becomes isolated from their main group due to geographical barriers. The main mechanisms resulting in allopatric speciation involve changes in the chromosomes of the organisms.Select the correct answer using the code given below:a)1 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Which of the following statements regarding ‘Speciation’ is/are correct? It is a process within evolution that leads to the formation of new and distinct species. Sympatric speciation occurs when a population of organisms becomes isolated from their main group due to geographical barriers. The main mechanisms resulting in allopatric speciation involve changes in the chromosomes of the organisms.Select the correct answer using the code given below:a)1 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements regarding ‘Speciation’ is/are correct? It is a process within evolution that leads to the formation of new and distinct species. Sympatric speciation occurs when a population of organisms becomes isolated from their main group due to geographical barriers. The main mechanisms resulting in allopatric speciation involve changes in the chromosomes of the organisms.Select the correct answer using the code given below:a)1 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer?.
Which of the following statements regarding ‘Speciation’ is/are correct? It is a process within evolution that leads to the formation of new and distinct species. Sympatric speciation occurs when a population of organisms becomes isolated from their main group due to geographical barriers. The main mechanisms resulting in allopatric speciation involve changes in the chromosomes of the organisms.Select the correct answer using the code given below:a)1 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer? for UPSC 2024 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Which of the following statements regarding ‘Speciation’ is/are correct? It is a process within evolution that leads to the formation of new and distinct species. Sympatric speciation occurs when a population of organisms becomes isolated from their main group due to geographical barriers. The main mechanisms resulting in allopatric speciation involve changes in the chromosomes of the organisms.Select the correct answer using the code given below:a)1 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for UPSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements regarding ‘Speciation’ is/are correct? It is a process within evolution that leads to the formation of new and distinct species. Sympatric speciation occurs when a population of organisms becomes isolated from their main group due to geographical barriers. The main mechanisms resulting in allopatric speciation involve changes in the chromosomes of the organisms.Select the correct answer using the code given below:a)1 onlyb)2 and 3 onlyc)1 and 3 onlyd)1, 2 and 3Correct answer is option 'A'. Can you explain this answer?.
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