KCET · BIOLOGY · STD 12 - 1. Sexual Reproduction in Flowering Plants
Primary endosperm nucleus is formed by fusion of
- A Two polar nuclei and two male gametes
- B Two polar nuclei and one male gametes
- C Ovum and male gamete
- D One polar nucleus and male gamete
Answer & Solution
Correct Answer
(B) Two polar nuclei and one male gametes
Step-by-step Solution
Detailed explanation
(B) Two polar nuclei and one male gametes,
The primary endosperm nucleus (PEN) is formed by the fusion of a secondary nucleus and a male gamete. The secondary nucleus is formed by the fusion of two haploid polar nuclei. As, three fusions are involved in the formation of the primary endosperm nucleus, the process is called triple fusion.
The primary endosperm nucleus (PEN) is formed by the fusion of a secondary nucleus and a male gamete. The secondary nucleus is formed by the fusion of two haploid polar nuclei. As, three fusions are involved in the formation of the primary endosperm nucleus, the process is called triple fusion.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from BIOLOGY
- Most of the endangered species are the victims ofKCET 2010 Easy
- Identify the odd one from the following.KCET 2022 Hard
- DNA replicates semiconservatively was first shown inKCET 2022 Medium
- The frequency of heart beat in our body maintained byKCET 2012 Hard
- If 30J energy is trapped at product level, then how much energy will be available to peacock as food in the following chain?
Plant → Mice → Snake → PeacockKCET 2015 Easy - The gene for haemophilia is located on 'X' chromosome. Hence it is normally impossible for aKCET 2016 Easy
More PYQs from KCET
- Statement A: Photorespiration decreases photosynthetic output.
Statement B: In photorespiratory pathway, neither ATP nor NADPH is produced.KCET 2014 Medium - An infinitely long thin straight wire has uniform charge density of \(\frac{1}{4} \times 10^{-2} \mathrm{~cm}^{-1}\).
What is the magnitude of electric field at a distance \(20 \mathrm{~cm}\) from the axis of the wire?KCET 2020 Medium - The IUPAC name of
isKCET 2012 Easy - The plane \( 2 x-3 y+6 z-11=0 \) makes an angle \( \sin ^{-1}(\alpha) \) with \( X \)-axis. The value of a is equal
toKCET 2017 Easy - The following is a scheme showing the electron transport system. Identify the electron carrier molecules indicated as A and B. Choose the correct option,
KCET 2010 Easy - From the graph of angle of deviation versus angle of incidence for an equilateral prism, the refractive index of material of prism is
KCET 2026 Medium