Download App

STD 12 - 1. sexual reproduction in flowering plants — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - 1. sexual reproduction in flowering plants4 Marks
MCQ
Which one of the following statements is not true?
  • A
    Pollen grains are released from anthers at $2-$celled state
  • B
    Sporogenous cell directly behaves as the megaspore mother cell
  • ✓
    Megaspore divides twice to form an eight nucleate embryo sac
  • D
    Egg and synergids always lie near the micropylar end of ovule
✓

Answer

Correct option: C.
Megaspore divides twice to form an eight nucleate embryo sac
c
Megaspore mother cell is developed inside the nucellus and by a meiotic division, it forms four megaspores. Out of these, generally three degenerate and remaining one is called functional megaspore. It undergoes mitosis three times without cytoplasmic division to form an eight nucleate embryo sac.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

NEET STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

Structure of leaf which provide channels of transport for water, minerals and food materials is called
→
Assertion: Hilvax, Spirogyra and some species of Chlamydomonas have haplontic life cycle.
Reason: The dominant, photosynthetic phase in such plants is the free-living gametophyte and sporophytic generation is represented only by the one-celled zygote.
→
Consider the following statements regarding reproduction in class-Chloropyceae.

$I.$ Asexual reproduction is mainly by flagellated zoospores produced in zoosporangia.

$II.$ The sexual reproduction shows considerable variation in the type and formation of sex cells and it may be isogamous, anisogamous and oogamous.

Which of the statements given above are correct?

→
During meiosis $I$, the chromosomes start pairing at
→
In $‘S’$ phase of the cell cycle
→
In which group of the following would you place the plants having vascular tissue and lacking seeds?
→
Read the following statements :
$(A)$ India has a greater ecosystem diversity than Norway.
$(B)$ According to the $IUCN$ $(2004)$, the total number of plant and animal species described so far is slightly more than $15$ millions.
→
Statement I: Geitonogamy is genetically cross pollination.
Statement II: In geitonogamy the pollen grains come from the different plant.
→
Logistic growth is represented by which equation
→
After a series of experiments, it was concluded that the ...$A$... of coleoptile was the site of transmittable influence that caused the ...$B$... of the entire coleoptile.

Complete the given statement with the correct combination of options given in the codes below

→