Practicing Success

Target Exam

CUET

Subject

Biology

Chapter

Plant Growth and Development

Question:

Assertion: Plant retains the capacity for limited growth throughout their life due to the presence of meristem at certain location of body.
Reason: The cells of meristems have the capacity to divide and self-perpetuate.

Options:

Both Assertion and Reason are true and reason is the correct explanation of assertion.

Both Assertion and Reason are true but reason is not the correct explanation of assertion.

Assertion is true but reason is false.

Assertion is false but reason is true.

Correct Answer:

Assertion is false but reason is true.

Explanation:

The correct answer is Option (4) -Assertion is false but reason is true.

Plant growth is unique because plants retain the capacity for unlimited growth throughout their life. This ability of the plants is due to the presence of meristems at certain locations in their body. The cells of such meristems have the capacity to divide and self-perpetuate.

The product, however, soon loses the capacity to divide and such cells make up the plant body. This form of growth wherein new cells are always being added to the plant body by the activity of the meristem is called the open form of growth. 

Germination and seedling development in bean the primary growth of the plants and principally contribute to the elongation of the plants along their axis.

You also know that in dicotyledonous plants and gymnosperms, the lateral meristems, vascular cambium and cork-cambium appear later in life. These are the meristems that cause the increase in the girth of the organs in which they are active. This is known as secondary growth of the plant.