
Which of the following is evidence for the endosymbiotic theory?
A) Eukaryotic cells have DNA
B) Eukaryotic cells have organelles
C) The mitochondria and chloroplast have their own DNA
D) Prokaryotic cells are typically larger than eukaryotic cells.
Answer
497.7k+ views
Hint:According to the endosymbiotic theory, eukaryotic cells evolved by taking prokaryotic cells. This was a beneficial or mutually symbiotic relationship, and over time, the prokaryotic cells lost many of their other functions, becoming integral parts of the bigger cell.
Complete answer:
>All living cells have DNA, whether they are prokaryotic or eukaryotic cells. This includes the bacteria, Archaea, plants, algae, protozoans and higher animals. Option A is incorrect.
>Eukaryotic cells have a number of intracellular organelles designed for specific functions, like Golgi bodies for intracellular transport, but this is not evidence of them having existed as separate cells that were then engulfed by the eukaryotic cell. Option B is not correct.
>Mitochondria and Chloroplast both have their own DNA and are able to replicate/divide independently of the main cell. This supports the theory that eukaryotic cells engulfed photosynthetic and chemosynthetic prokaryotes at some point in evolution. Option C is the correct answer.
>Option D is not correct. A prokaryotic cell is typically smaller than a eukaryotic cell. Being smaller in size, they can manage intracellular functions without the need for organelles.
Virus falls outside the purview of either kind of cell. As they are unable to exist, carry out any metabolic functions, or reproduce without the host, they are called particles, and not cells. However, as they depend on a host for survival and reproduction, evolutionarily they are younger than either cell type.
Hence the correct answer is option ‘C’.
Note:Eukaryotic cells include the presence of intracellular organelles, the presence of a membrane bound nucleus, both features of which are absent in prokaryotic cells. Bacteria and Archaea are prokaryotes.
Complete answer:
>All living cells have DNA, whether they are prokaryotic or eukaryotic cells. This includes the bacteria, Archaea, plants, algae, protozoans and higher animals. Option A is incorrect.
>Eukaryotic cells have a number of intracellular organelles designed for specific functions, like Golgi bodies for intracellular transport, but this is not evidence of them having existed as separate cells that were then engulfed by the eukaryotic cell. Option B is not correct.
>Mitochondria and Chloroplast both have their own DNA and are able to replicate/divide independently of the main cell. This supports the theory that eukaryotic cells engulfed photosynthetic and chemosynthetic prokaryotes at some point in evolution. Option C is the correct answer.
>Option D is not correct. A prokaryotic cell is typically smaller than a eukaryotic cell. Being smaller in size, they can manage intracellular functions without the need for organelles.
Virus falls outside the purview of either kind of cell. As they are unable to exist, carry out any metabolic functions, or reproduce without the host, they are called particles, and not cells. However, as they depend on a host for survival and reproduction, evolutionarily they are younger than either cell type.
Hence the correct answer is option ‘C’.
Note:Eukaryotic cells include the presence of intracellular organelles, the presence of a membrane bound nucleus, both features of which are absent in prokaryotic cells. Bacteria and Archaea are prokaryotes.
Latest Vedantu courses for you
Grade 11 Science PCM | CBSE | SCHOOL | English
CBSE (2025-26)
School Full course for CBSE students
₹41,848 per year
EMI starts from ₹3,487.34 per month
Recently Updated Pages
Master Class 11 Business Studies: Engaging Questions & Answers for Success

Master Class 11 Economics: Engaging Questions & Answers for Success

Master Class 11 Accountancy: Engaging Questions & Answers for Success

Master Class 11 Computer Science: Engaging Questions & Answers for Success

Master Class 11 English: Engaging Questions & Answers for Success

Master Class 11 Maths: Engaging Questions & Answers for Success

Trending doubts
Which one is a true fish A Jellyfish B Starfish C Dogfish class 11 biology CBSE

The flightless birds Rhea Kiwi and Emu respectively class 11 biology CBSE

Difference Between Prokaryotic Cells and Eukaryotic Cells

1 ton equals to A 100 kg B 1000 kg C 10 kg D 10000 class 11 physics CBSE

One Metric ton is equal to kg A 10000 B 1000 C 100 class 11 physics CBSE

How much is 23 kg in pounds class 11 chemistry CBSE
