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A common characteristic feature of plant sieve-tube cells and mammalian erythrocytes is
- a)the absence of a nucleus
- b)the absence of chloroplast
- c)the absence of cell wall
- d)the presence of hemoglobin
Correct answer is option 'A'. Can you explain this answer?
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A common characteristic feature of plant sieve-tube cells and mammalia...
Characteristic feature of plant sieve-tube cells and mammalian erythrocytes
The characteristic feature of plant sieve-tube cells and mammalian erythrocytes is the absence of a nucleus.
Plant sieve-tube cells
Plant sieve-tube cells are specialized cells found in the phloem tissue of plants. They are responsible for transporting the products of photosynthesis, such as sugars, from the leaves to other parts of the plant.
- Structure: Sieve-tube cells are long, thin cells that are connected end-to-end to form a sieve tube. They have a specialized structure that allows them to transport materials efficiently.
- Absence of nucleus: During development, the nucleus of the sieve-tube cell degenerates, leaving a large open space in the center of the cell. This allows for the efficient movement of materials through the sieve tube.
Mammalian erythrocytes
Mammalian erythrocytes, also known as red blood cells, are responsible for transporting oxygen from the lungs to the body's tissues.
- Structure: Erythrocytes are small, disk-shaped cells that are filled with hemoglobin, a protein that binds and carries oxygen.
- Absence of nucleus: During development, the nucleus of the erythrocyte is expelled, leaving more space for hemoglobin. This allows for more efficient oxygen transport.
Conclusion
In summary, both plant sieve-tube cells and mammalian erythrocytes have the characteristic feature of the absence of a nucleus. This allows for more efficient transport of materials in the case of sieve-tube cells and oxygen in the case of erythrocytes.
The characteristic feature of plant sieve-tube cells and mammalian erythrocytes is the absence of a nucleus.
Plant sieve-tube cells
Plant sieve-tube cells are specialized cells found in the phloem tissue of plants. They are responsible for transporting the products of photosynthesis, such as sugars, from the leaves to other parts of the plant.
- Structure: Sieve-tube cells are long, thin cells that are connected end-to-end to form a sieve tube. They have a specialized structure that allows them to transport materials efficiently.
- Absence of nucleus: During development, the nucleus of the sieve-tube cell degenerates, leaving a large open space in the center of the cell. This allows for the efficient movement of materials through the sieve tube.
Mammalian erythrocytes
Mammalian erythrocytes, also known as red blood cells, are responsible for transporting oxygen from the lungs to the body's tissues.
- Structure: Erythrocytes are small, disk-shaped cells that are filled with hemoglobin, a protein that binds and carries oxygen.
- Absence of nucleus: During development, the nucleus of the erythrocyte is expelled, leaving more space for hemoglobin. This allows for more efficient oxygen transport.
Conclusion
In summary, both plant sieve-tube cells and mammalian erythrocytes have the characteristic feature of the absence of a nucleus. This allows for more efficient transport of materials in the case of sieve-tube cells and oxygen in the case of erythrocytes.
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A common characteristic feature of plant sieve-tube cells and mammalian erythrocytes isa)the absence of a nucleusb)the absence of chloroplastc)the absence of cell walld)the presence of hemoglobinCorrect answer is option 'A'. Can you explain this answer?
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A common characteristic feature of plant sieve-tube cells and mammalian erythrocytes isa)the absence of a nucleusb)the absence of chloroplastc)the absence of cell walld)the presence of hemoglobinCorrect answer is option 'A'. Can you explain this answer? for Teaching 2024 is part of Teaching preparation. The Question and answers have been prepared according to the Teaching exam syllabus. Information about A common characteristic feature of plant sieve-tube cells and mammalian erythrocytes isa)the absence of a nucleusb)the absence of chloroplastc)the absence of cell walld)the presence of hemoglobinCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Teaching 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A common characteristic feature of plant sieve-tube cells and mammalian erythrocytes isa)the absence of a nucleusb)the absence of chloroplastc)the absence of cell walld)the presence of hemoglobinCorrect answer is option 'A'. Can you explain this answer?.
A common characteristic feature of plant sieve-tube cells and mammalian erythrocytes isa)the absence of a nucleusb)the absence of chloroplastc)the absence of cell walld)the presence of hemoglobinCorrect answer is option 'A'. Can you explain this answer? for Teaching 2024 is part of Teaching preparation. The Question and answers have been prepared according to the Teaching exam syllabus. Information about A common characteristic feature of plant sieve-tube cells and mammalian erythrocytes isa)the absence of a nucleusb)the absence of chloroplastc)the absence of cell walld)the presence of hemoglobinCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Teaching 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A common characteristic feature of plant sieve-tube cells and mammalian erythrocytes isa)the absence of a nucleusb)the absence of chloroplastc)the absence of cell walld)the presence of hemoglobinCorrect answer is option 'A'. Can you explain this answer?.
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