17. A few statements on early developmental stages in plants are given below:
A. The cells of flower are diploid in nature.
B. Only some specialized cells in reproductive organs undergo meiosis produce haploid cells.
C. The haploid cells produced in (B) above, undergo a few normal mitotic cell divisions.
D. All the progeny cells produced in (B) above, differentiate either into haploid egg cells or into haploid sperm cells.
Which one of the following combinations of above statements is correct?
(1) A, B and C (2) B, C and D
(3) A, C and D (4) A, B and D
The correct combination of statements regarding early developmental stages in plants is:
(1) A, B and C
Explanation:
-
(A) The cells of flower are diploid in nature — Correct. Most cells in the flower, including those in sporophytic tissues, are diploid.
-
(B) Only some specialized cells in reproductive organs undergo meiosis to produce haploid cells — Correct. Meiosis is restricted to specialized sporogenous cells producing spores.
-
(C) The haploid cells produced in (B) above undergo a few normal mitotic cell divisions — Correct. The haploid spores divide mitotically to form multicellular gametophytes.
-
(D) All progeny cells produced in (B) differentiate either into haploid egg cells or into haploid sperm cells — Incorrect. Gametophyte cells include accessory cells, not all become gametes.
Introduction
Plant reproduction involves an alternation between diploid sporophyte and haploid gametophyte generations. Early development includes meiosis in specialized cells in reproductive organs to produce haploid spores, which then undergo mitotic divisions to develop into gametophytes. Understanding these stages is critical to comprehending plant life cycles.
Diploid and Haploid Phases
-
Flowers consist predominantly of diploid sporophytic cells (Statement A).
-
Within reproductive organs, specific cells called sporogenous cells undergo meiosis (Statement B) to produce haploid spores essential for gametophyte formation.
-
These haploid spores divide mitotically (Statement C) to form multicellular gametophytes that produce gametes.
Differentiation into Gametes
-
Not all progeny cells of the gametophyte mature into gametes; many form accessory or supportive cells within the gametophyte, making Statement D incorrect.
Summary Table: Plant Early Developmental Stages
| Statement | Content | Accuracy |
|---|---|---|
| A | Flower cells diploid | Correct |
| B | Specialized cells undergo meiosis to make haploid cells | Correct |
| C | Haploid cells undergo mitosis to form gametophyte | Correct |
| D | All haploid progeny become gametes | Incorrect |
Conclusion
Statements A, B, and C accurately describe early plant developmental stages involving diploid cells, meiosis, and mitotic division of haploid cells into gametophytes. Statement D is false as not all gametophyte cells differentiate into gametes.
3 Comments
Kajal
November 18, 2025A, B and C are correct
Kavita Choudhary
November 20, 2025Statement A B and c is correct
The cell of flowr are diploid in nature
Only some specialized reproductive organ undergo to meiosis produse haploid cell
Manisha choudhary
December 7, 2025A,B,C correct statement h D incorrect statement h kyoki gametophyte m assesory cell bhi bnti h only sperm or egg cell nhi bnti
Male m vegitatve cell and sperm cell bnti h
Female m synergid cell ,antipodal cell ,central cell
Male gametophyte pollen grain h 2 cell stage 1 vegitatve cell during pollination
After pollination pollen tube m germinative cell 2 sperm cell bna leti h 3 cell stage
Female gametophyte 8 nuclei 7 cell stage hota h