Read the passage carefully and answer the questions based on the passage:
Pollen pistil interaction involves all events from the landing of pollen grains on the stigma until the pollen tube enters the embryo sac (when the pollen is compatible). When a pollen tube grows through the style and enters into the ovules, it finally discharges two male gametes in one of the synergids. Syngamy and triple fusion are two fusion events occur in angiosperms. Thus, angiosperms exhibit double fertilization. The products of these fusions are the diploid zygote and triploid primary endosperm nucleus. Zygote develops into embryo and primary endosperm cell forms the endosperm tissue. The developing embryo passes through different stages before maturation.
Which of the following is not a stage of growing embryo in dicotyledon plants?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → Epiblast
The passage says the developing embryo passes through different stages before maturation. In a dicot, the zygote forms the proembryo, then the globular, heart-shaped and mature embryo.
Option (1) Heart-shaped — A stage of the dicot embryo.
Option (2) Globular — A stage of the dicot embryo.
Option (3) Proembryo — A stage of the dicot embryo.
Option (4) Epiblast — Not a stage of the dicot embryo. The epiblast is a small outgrowth of the embryo in some grasses (monocots). It is a structure, not a stage of growth, and it is not found in the dicot embryo.
Note: The passage is taken from NCERT. NTA has put lines of the NCERT text together to make it. Most CUET (UG) questions come straight from NCERT, so study the book line by line, including figures and their titles.
NCERT Extract:
Embryo –
