#plant science

BOTANY

Which of the following statements about flower symmetry is correct?

Actinomorphic flowers, such as mustard, can be divided into equal halves in multiple planes. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.

Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Botany section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Botany portion (Latest NCERT Textbooks for Academic Session 2026-27 -

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BOTANY

Which bacteria are primarily responsible for nitrogen fixation in leguminous plants?

Rhizobium forms symbiotic relationships with leguminous plants and helps in nitrogen fixation. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.

Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Botany section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Botany portion (Latest NCERT Textbooks for Academic Session 2026-27 -

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ZOOLOGY

Which part of the plant is commonly used for producing virus-free plants through tissue culture?

Meristem tissues are used in tissue culture to produce virus-free plants as they are usually not infected by viruses. This follows from NCERT principle where relation explains outcome clearly for students.

Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Biology - Zoology portion covering relevant system and function, Topic: Structural organization and physiology.

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BOTANY

Which of the following is an example of a pinnately compound leaf?

Neem has a pinnately compound leaf, where multiple leaflets arise on a common rachis. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.

Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Botany section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Botany portion (Latest NCERT Textbooks for Academic Session 2026-27 -

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BOTANY

Which of the following wavelengths of light is least effective for photosynthesis?

Green light is least effective for photosynthesis because chlorophyll reflects most of it instead of absorbing it. This follows from NCERT principle where relation explains outcome clearly for students.

Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Biology - Botany portion covering relevant concept, Topic: Plant structure, physiology and applications.

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BOTANY

Which of the following statements about stem modifications is incorrect?

Thorns in citrus plants are modified stems, not leaves. They protect the plant from herbivores. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.

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BOTANY

What is the first stable product formed in the Calvin cycle?

3-PGA is the first stable product of carbon fixation in the Calvin cycle. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.

Ref: NCERT Biology Textbook for Class XI and XII (Botany section), Chapter: Morphology and Anatomy of Flowering Plants, Topic: Plant structure and tissue systems.

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Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid

Select the correct statement about plant hormones:

Abscisic acid induces seed dormancy, helping seeds survive unfavorable conditions. Cytokinins promote, not inhibit, cell division, and ethylene promotes, not delays, fruit ripening.

Ref: NCERT Class 11 Biology Chapter 13: Plant Growth and Development Plant Growth Regulators - Cytokinins Ethylene and Abscisic Acid

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Inflorescence - Racemose and Cymose Types

Which of the following statements about venation is correct?

Monocots, such as grasses, exhibit parallel venation, where veins run parallel to each other.

Ref: NCERT Class 11 Biology Chapter 5: Morphology of Flowering Plants Inflorescence - Racemose and Cymose Types

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Inflorescence - Racemose and Cymose Types

Which of the following statements about inflorescence is incorrect?

In cymose inflorescence, the main axis terminates in a flower and does not grow continuously.

Ref: NCERT Class 11 Biology Chapter 5: Morphology of Flowering Plants Inflorescence - Racemose and Cymose Types

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Inflorescence - Racemose and Cymose Types

Which of the following statements about inflorescence is incorrect?

Capitulum is a type of racemose inflorescence, not cymose.

Ref: NCERT Class 11 Biology Chapter 5: Morphology of Flowering Plants Inflorescence - Racemose and Cymose Types

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Inflorescence - Racemose and Cymose Types

Which of the following statements about inflorescence is incorrect?

Cymose inflorescence has a basipetal arrangement, where older flowers are at the top and younger ones at the base.

Ref: NCERT Class 11 Biology Chapter 5: Morphology of Flowering Plants Inflorescence - Racemose and Cymose Types

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