Question

The pathway of water from soil upto the
secondary xylem
(a) Soil ➝ root hair ➝ cortex ➝ endodermis ➝
pericycle ➝ protoxylem ➝ meta xylem
(b) Metaxylem ➝ protoxylem ➝ pericycle ➝
cortex ➝endodermis ➝ soil ➝ root hair
(c) Cortex ➝ root hair ➝ endodermis ➝ pericycle
➝protoxylem ➝ metaxylem
(d) Pericycle ➝ soil ➝ root hair ➝ cortex
➝ endodermis ➝ protoxylem ➝ metaxylem

Answer 1

The pathway of water from soil up to the secondary xylem is:

(a) Soil ➝ root hair ➝ cortex ➝ endodermis ➝ pericycle ➝ protoxylem ➝ metaxylem

• The water is first picked up by the root hair from the soil.

• It then goes to the cortex which is the outermost part of the stem.

• It then gets transported to the endodermis that regulates the water that gets into the plant.

• From here it goes to pericycle that is just inside the endodermis.

• After that, it goes to protoxylem which is the first formed xylem.

• At last, it goes to metaxylem which is involved majorly in the conduction of water.

Answer 2

The correct order of transport of water from soil up to secondary xylem is

Soil ➝ root hair ➝ cortex ➝ endodermis ➝  pericycle ➝ protoxylem ➝ meta xylem

Option (A) is correct.

Explanation:

The correct order of transport of water from soil up to secondary xylem is

Soil ➝ root hair ➝ cortex ➝ endodermis ➝  pericycle ➝ protoxylem ➝ meta xylem

• Water is absorbed by the roots from the soil.

• It then moves to the cortex and then to the outer layer of the tissues known as epidermis.

• Water then goes to pericycle which is a middle layer between epidermis and phloem.
• Then it moves to and then to the last part of the plant i.e. meta xylem

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