NEET · Biology · STD 11 - 6. Anatomy flowering plants

Given below are two statements :
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:

A Statement \(I\) is incorrect but Statement \(II\) is true
B Both Statement \(I\) and Statement \(II\) are true
C Both Statement \(I\) and Statement \(II\) are false
D Statement \(I\) is correct but Statement \(II\) is false

Verified Solution

Answer & Solution

Correct Answer

(A) Statement \(I\) is incorrect but Statement \(II\) is true

Step-by-step Solution

Detailed explanation

Endarch and exarch are the terms often used for describing the position of primary xylem in the plant body.
Primary xylem is of two types protoxylem and metaxylem. On the basis of relative position of protoxylem and metaxylem in the organ the arrangement of primary xylem can be endarch or exarch.
Exarch type of primary xylem is seen in roots. Therefore, Statement \(I\) is false and Statement \(I I\) is true.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Match List \(I\) with List \(II\) related to digestive system of cockroach.

List \(I\)	List \(II\)
(A) The structures used for storing of food	(I) Gizzard
(B) Ring of \(6-8\) blind tubules at junction of foregut and midgut.	(II) Gastric Caeca
(C) Ring of \(100-150\) yellow coloured thin filaments at junction of midgut and hindgut.	(III) Malpighian tubules
(D) The structures used for grinding the food.	(IV) Crop

Choose the correct answer from the options given below:

NEET 2024 Medium

Identify the correct statements:
\(A\). Lenticels are the lens-shaped openings permitting the exchange of gases.
\(B\). Bark formed early in the season is called hard bark.
\(C\). Bark is a technical term that refers to all tissues exterior to vascular cambium.
\(D\). Bark refers to periderm and secondary phloem.
\(E\). Phellogen is single-layered in thickness.
Choose the correct answer from the options given below:

NEET 2023 Medium

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