Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: The first stage of gametophyte in the life cycle of moss is protonema stage.
Reason R: Protonema develops directly from spores produced in capsule.
In the light of the above statements, choose the most appropriate answer from the options given below:

NEET-2023 plant-kingdom [class-xi ]

• A is not correct but R is correct.
• Both A and R are correct and R is the correct explanation of A.
• Both A and R are correct but R is NOT the correct explanation of A.
• A is correct but R is not correct.
Correct Option: B  [ Both A and R are correct and R is the correct explanation of A. ]

Remark:

Identify the pair of heterosporous pteridophytes among the following:

NEET-2023 plant-kingdom [class-xi ]

• Equisetum and Salvinia
• Lycopodium and Selaginella
• Selaginella and Salvinia
• Psilolum and Salvinia
Correct Option: C  [ Selaginella and Salvinia ]

Remark:

Axile placentation is observed in

NEET-2023 Morphology-of-Flowering-Plants [class-xi ]

• China rose, Petunia and Lemon
• Mustard, Cucumber and Primorose
• China rose, Beans and Lupin
• Tomato, Dianthus and Pea
Correct Option: A  [ China rose, Petunia and Lemon ]

Remark:

Statement I: Endarch and exarch are the terms often used for describing the position of secondary xylem in the plant body.
Statement II: Exarch condition is the most common feature of the root system.
In the light of the above statements, choose the correct answer from the options given below:

NEET-2023 Anatomy-of-Flowering-Plants [class-xi ]

• Statement I is incorrect but Statement II is true.
• Both Statement I and Statement II are true.
• Both Statement I and Statement II are false.
• Statement I is correct but Statement II is false.
Correct Option: A  [ Statement I is incorrect but Statement II is true. ]

Remark:

Family Fabaceae differs from Solanaceae and Liliaceae. With respect to the stamens, pick out the characteristics specific to family Fabaceae but not found in Solanaceae or Liliaceae.

NEET-2023 Morphology-of-Flowering-Plants [class-xi ]

• Epiphyllous and Dithecous anthers
• Diadelphous and Dithecous anthers
• Polyadelphous and epipetalous stamens
• Monoadelphous and Monothecous anthers
Correct Option: B  [ Diadelphous and Dithecous anthers ]

Remark:

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: Late wood has fewer xylary elements with narrow vessels.
Reason R: Cambium is less active in winters.
In the light of the above statements, choose the correct answer from the options given below:

NEET-2023 Anatomy-of-Flowering-Plants [class-xi ]

• A is false but R is true.
• Both A and R are true and R is the correct explanation of A.
• Both A and R are true but R is NOT the correct explanation of A.
• A is true but R is false.
Correct Option: B  [ Both A and R are true and R is the correct explanation of A. ]

Remark:

Cellulose does not form blue colour with lodine because

NEET-2023 Biomolecules [class-xi ]

• It breakes down when iodine reacts with it.
• It is a disaccharide.
• It is a helical molecule.
• It does not contain complex helices and hence cannot hold iodine molecules.
Correct Option: D  [ It does not contain complex helices and hence cannot hold iodine molecules. ]

Remark:

Among eukaryotes, replication of DNA takes place in

NEET-2023 Cell-Cycle-and-Cell-Division [class-xi ]

• G₂ phase
• M phase
• S phase
• G₁ phase
Correct Option: C  [ S phase ]

Remark:

Which of the following stages of meiosis involves division of centromere?

NEET-2023 Cell-Cycle-and-Cell-Division [class-xi ]

• Telophase
• Metaphase I
• Metaphase II
• Anaphase II
Correct Option: D  [ Anaphase II ]

Remark:

The process of appearance of recombination nodules occurs at which sub stage of prophase I in meiosis?

NEET-2023 Cell-Cycle-and-Cell-Division [class-xi ]

• Diakinesis
• Pachytene
• Zygotene
• Diplotenes
Correct Option: B  [ Pachytene ]

Remark: