Read the following statements and select the correct option.Statement ...
Euglena is studied as plant as well as animal. It is called plant animal.
Plant characters of Euglena:
(i) Presence of chloroplasts with chlorophyll.
(ii) Holophytic (photosynthetic) nutrition in presence of light.
Animal characters of Euglena:
(i) Presence of pellicle which is made up of proteins and not of cellulose. -
(ii) Presence of stigma and paraflagellar body (photosensitive structures).
(iii) Presence of contractile vacuole (not found in plants).
(iv) Presence of longitudinal binary fission.
(v) Can show holozoic nutrition when deprived of light.
This question is part of UPSC exam. View all NEET courses
Read the following statements and select the correct option.Statement ...
Explanation:
• Statement 1: Euglena can be considered as a plant due to the presence of chlorophyll.
This statement is partially correct. Euglena is a unicellular organism that contains chlorophyll and can perform photosynthesis like plants. However, Euglena also possesses features of an animal-like heterotrophic organism. Therefore, it cannot be classified solely as a plant.
• Statement 2: Euglena cannot be classified on the basis of two kingdom system of classification.
This statement is correct. The two kingdom system of classification was proposed by Carolus Linnaeus, which classified organisms into two kingdoms, Plantae and Animalia. However, this system is not adequate for the classification of Euglena, which possesses both plant-like and animal-like characteristics. Therefore, Euglena requires a separate classification system.
• Conclusion:
Both statements 1 and 2 are correct, but statement 2 is not the correct explanation of statement 1. Although Euglena contains chlorophyll and can perform photosynthesis like plants, it cannot be considered solely as a plant and requires a separate classification system.
Read the following statements and select the correct option.Statement ...
Explanation:
Statement 1: Euglena can be considered as a plant due to the presence of chlorophyll.
- Euglena is a unicellular organism that possesses chloroplasts, which contain chlorophyll.
- Chlorophyll is a pigment that is primarily responsible for photosynthesis in plants.
- Hence, Euglena can be considered as a photosynthetic organism similar to plants.
Statement 2: Euglena cannot be classified on the basis of two kingdom system of classification.
- The two kingdom system of classification is based on the presence or absence of a nucleus in an organism.
- Plants are classified under the kingdom Plantae, which includes all multicellular organisms that possess a cell wall and chloroplasts.
- Animals are classified under the kingdom Animalia, which includes all multicellular organisms that lack a cell wall and chloroplasts.
- However, Euglena is a unicellular organism that possesses a nucleus and chloroplasts, making it difficult to classify using the two kingdom system.
Conclusion:
- Both statements 1 and 2 are correct.
- However, statement 2 is not the correct explanation of statement 1.
- While Euglena does possess chlorophyll and can be considered as a photosynthetic organism similar to plants, its classification cannot be determined using the two kingdom system due to its unique characteristics.
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.