alleryWhich condition for growth supports extension growth through cell turgidity?
- Water
- Light
- Gravity
- Oxygen
Show answer and solution
Correct answer: A. Water
Cell enlargement needs water, and the resulting turgidity drives extension growth.
NEET UG Plant Growth and Development — practice questions — page 3
Explore 109 free Plant Growth and Development questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 61–90 of 109.
Which condition for growth supports extension growth through cell turgidity?Read the answer and worked solution →Oxygen supports plant growth mainly byRead the answer and worked solution →While differentiating into a tracheary element, a plant cellRead the answer and worked solution →When living differentiated plant cells regain the ability to divide, it is calledRead the answer and worked solution →Cells made by a dedifferentiated meristem that again stop dividing and take up specific functions areRead the answer and worked solution →Development covers all changes in a plant's life cycle fromRead the answer and worked solution →The ability of a plant to form different structures in response to environment or life phase isRead the answer and worked solution →Heterophylly due to environment, with different leaves in air and water, is seen inRead the answer and worked solution →Broadly, development in plants is considered the sum ofRead the answer and worked solution →Which of these is an intrinsic factor controlling plant development?Read the answer and worked solution →Chemically, kinetin is a derivative ofRead the answer and worked solution →Abscisic acid is chemically derived fromRead the answer and worked solution →Ethylene can fit either group of PGRs, but it is largelyRead the answer and worked solution →Which PGR belongs to the group involved in dormancy and abscission?Read the answer and worked solution →Charles and Francis Darwin observed phototropism in coleoptiles ofRead the answer and worked solution →F.W. Went isolated auxin from coleoptile tips of which seedlings?Read the answer and worked solution →Bakanae or foolish seedling disease of rice is caused byRead the answer and worked solution →In which year did E. Kurosawa report bakanae symptoms from sterile fungal filtrates?Read the answer and worked solution →Who identified and crystallised kinetin in 1955?Read the answer and worked solution →Inhibitor-B, abscission II and dormin were later shown to be the same asRead the answer and worked solution →H.H. Cousins found a volatile from ripe oranges that hastened ripening of storedRead the answer and worked solution →Auxins were first isolated fromRead the answer and worked solution →Which pair consists only of synthetic auxins?Read the answer and worked solution →Removing shoot tips is widely used in tea plantations because itRead the answer and worked solution →Auxins are used to induce parthenocarpy in which crop?Read the answer and worked solution →Gibberellins are sprayed on grape crops mainly toRead the answer and worked solution →Which PGR is used to speed up malting in the brewing industry?Read the answer and worked solution →Spraying sugarcane with gibberellins can raise its yield by as much asRead the answer and worked solution →Bolting, the internode elongation just before flowering in cabbage, is promoted byRead the answer and worked solution →Spraying juvenile conifers with gibberellins leads toRead the answer and worked solution →
Worked practice questions
Oxygen supports plant growth mainly by
- Maintaining cell turgidity
- Releasing metabolic energy
- Providing a medium for enzymes
- Building protoplasm directly
Show answer and solution
Correct answer: B. Releasing metabolic energy
Oxygen is used in respiration, which releases the metabolic energy that growth activities need.
While differentiating into a tracheary element, a plant cell
- Loses its protoplasm
- Keeps thin primary walls
- Develops a larger nucleus
- Gains extra chloroplasts
Show answer and solution
Correct answer: A. Loses its protoplasm
Tracheary elements become dead conducting cells, losing protoplasm and forming strong lignocellulosic secondary walls.
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