Meristems are not found in -a)Cycas stemb)Fern leafc)Fern rhizomed) Pollen of pinusCorrect answer is option 'D'. Can you explain this answer?

Question

Answer

Meristems are classified by their location in the plant as apical (located at root and shoot tips), lateral (in the vascular and cork cambia), and intercalary (at internodes, or stem regions between the places at which leaves attach, and leaf bases, especially of certain monocotyledons—e.g., grasses).

Answer

If it contain meristem than rhizome can develop its shape and size but we know that the rhizomes of bryophytes are of reduced type...so....

Answer

Correct option is c

Answer

Understanding Meristems
Meristems are regions of undifferentiated cells in plants that are capable of continuous division, allowing for growth. They are primarily responsible for the formation of new tissues and organs in plants.
Locations of Meristems
- Cycas Stem:
- Cycas is a gymnosperm that has apical meristems at the tips of its stems and roots. This allows for upward and downward growth, respectively.
- Fern Leaf:
- Ferns possess meristematic tissues in their leaves, particularly at the growing tips. This enables the leaves to expand and grow.
- Fern Rhizome:
- Rhizomes are horizontal underground stems in ferns that also contain meristematic tissues. These help in vegetative reproduction and growth.
Absence of Meristems in Pollen of Pinus
- Pollen of Pinus:
- Pollen grains are the male gametophytes of gymnosperms, including Pinus. They are specialized for reproduction and are not involved in growth or tissue formation.
- Pollen grains do not possess meristematic cells because they do not contribute to the growth or development of the plant. Their primary function is to transport male gametes for fertilization.
Conclusion
In summary, meristems are crucial for the growth of various plant structures, but they are absent in pollen grains, which serve a different reproductive role. Thus, the correct answer to the question is option 'D'.

Answer

Pollen of Pinus do not have meristems. A meristem is the tissue in most plants containing undifferentiated cells, found in zones of the plant where growth can take place. Meristematic cells give rise to various organs of the plant and keep the plant growing. Meristematic cells are incompletely or not at all differentiated, and are capable of continued cellular division.

Thus, the correct answer is option D.

Similar NEET Doubts

Meristems are not found in a.fern leaf b.fern rhizome c. Pollen of pinus d.cycas stem?

Successive ring of vascular cambium is found in :-(

Winged pollen grains are found in .?

Assertion: Apical meristem and intercalary meristem both are primary meristems.Reason: Both of these meristems appear early in life of a plant and help in the formation of the primary plant body.

The meristems which occur at the tips of roots and shoots and produce primary tissues are called

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