T.S of Dicot and Monocot Root

Q.

The parenchymatous cells between the xylem and the phloem in a dicot root constitute

1. medullary ray.

2. Complementary tissue.

3. Conjunctive tissue.

4. epithem tissue.

Q.

Radial, polyarch, exarch vascular bundles occur in:

1. Monocot root

2. Dicot root

3. Dicot stem

4. Monocot stem

Q.

Radial, diarch, exarch vascular bundles occur in

1. dicot stem

2. monocot stem.

3. monocot root

4. dicot root

Q.

What do the following figures A and B represent?

1. A - C.S.of young dicot stem, B - C.S. of young dicot root

2. A - C.S. of young dicot root, B - C.S. of old dicot root

3. A - C.S. of young dicot root, B - C.S. of monocot root

4. A - C.S.of monocot stem, B - C.S. of young dicot root

Q. You are given a fairly old piece of dicot stem and a dicot root. Which of the following anatomical structures will you use to distinguish between the two?

1. Secondary xylem
2. Secondary phloem
3. Protoxylem
4. Cortical cells

Q.

In dicot roots

1. Xylem is always endarch

2. Vascular bundles are scattered and have cambium.

3. Xylem and phloem bundles are radially arranged.

4. Xylem is always exarch

Q.

Which of these is true for dicot roots?

1. Xylem is always endarch.

2. Xylem and phloem bundles are radially arranged.

3. Vascular bundles are scattered and have cambium.

4. Vascular bundles are arranged in the form of a ring at the same radius.

Q.

What do the following figures A and B represent?

1. A - C.S.ofmonocot stem B - C.S. of young dicot root

2. A - C.S. of young dicot root B - C.S. of monocot root.

3. A - C.S. of old dicot root B - C.S. of old dicot root.

4. A - C.S.of young dicot stem B - C.S. of young dicot root

Q. Four radial vascular bundles are found in:

1. Dicot root
2. Monocot root
3. Monocot stem
4. Dicot stem

Q. Consider the following statements.
I. In a dicot root, the vascular bundles are collateral and endarch.
II. The innermost layer of cortex in a dicot root is endodermis.
Ill. In a dicot root, the phloem masses are separated from the xylem by parenchymatous cells that are known as the conjunctive tissue.
Choose the correct option.

1. II is correct, but I and III are incorrect
2. I is incorrect, but II and III are correct
3. I is correct. but II and III are incorrect
4. II is incorrect, but I and Ill are correct
5. III is correct, but I and II are incorrect