Question

Which of the following statements are true for meristematic tissues? 1) consist of a group of actively dividing cells 2)cells have thin wall and nucleus is absent 3)intercalary metistem is found at the tip of roots 4)apical meristem occurs below the bark and in vascular bundles of dicot stem and root

Answer 1

Answer:

4 apical meristem occurs below the bark

Answer 2

Answer:

Statement 1) They consist of a group of actively dividing cells is true.                                                                      

Explanation:

• Meristematic tissues are the embryonic tissue regions primarily concerned with the formation of new cells. Their presence is restricted to roots and shoots tips.

• These localised growing tissues remain embryonic and are maintained throughout the life of the plant so that its body is a composite of adult and juvenile tissues.

Characteristics of meristematic cells:

• Active cells with enriched protoplasm.

• Presence of a Thin cell wall

• Active cell with large nuclei

• Intercellular spaces are absent

Now let us discuss the discarded statements-

• The meristematic cells have a thin cell wall and large nuclei (characteristic feature), hence statement 2) is false.

• Based on the position or location of the meristem, it is the apical meristem that is mainly located in growing roots and shoots tips.

• And it is an intercalary meristem that occurs in between permanent tissues or below the bark and in vascular bundles of the dicot stem and root. Thus both statements 3) & 4) are false.

Therefore among the given statements, 1) consisting of a group of actively dividing cells is true and the most appropriate for meristematic tissues.

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