Download App

Sexual Reproduction in Flowering Plants — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYSexual Reproduction in Flowering Plants2 Marks
Question
What is endosperm? Describe free nuclear and cellular type of endosperms.
✓

Answer

Endosperm is a post-fertilization product which develops as a result of triple fussion and is triploid tissue that provides nutrition to developing embryo.
Free nuclear engosperm : Here the primary endosperm nucleus divides freely is mitotic way forming several daughter nuclei. These nuclei rearrange from periphery towards centre in embryo sac and these occurs no wall formation finally wall formed occurs from periphery towards nucleus e.g.capsella.
Cellular endosperms : Here each division of nucleus is followed wall formation so that multicellular irregularly arranged mass of endosperm is formed e.g. Adoxa. 

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

More "2 Marks Questions" from Sexual Reproduction in Flowering Plants→Sexual Reproduction in Flowering Plants — all question types→BIOLOGY STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

A plasmid DNA and a linear DNA (both are of the same size) have one site for a restriction endonuclease. When cut and separated on agarose gel electrophoresis, plasmid shows one DNA band while linear DNA shows two fragments. Explain.
→
Higher organisms have resorted to sexual reproduction in spite of its complexity. Why?
→
Name the microbes that help production of the following products commercially:
(a) Statin
(b) Citric acid
(c) Penicillin
(d) Butyric acid
→
How does global warming pose a threat to the coastal areas of the earth? Explain.
→
Why are coral reefs not found from West Bengal to Andhra Pradesh but found in Tamil Nadu on the east coast of India?
→
Name the four functional aspects of an ecosystem.
→
Draw labelled diagrams of stable and declining age pyramids of human population.
→
  1. Name any two helminths, which are known to be pathogenic to humans.
  2. List two symptoms of the disease caused by any one of them.
→
Why does the son of a carrier mother and a normal father suffer from haemophilia, whereas the son of a haemophilic father and a normal mother would not? Explain.
→
Write the name of the pathogen of amoeba. Write two symptoms of the disease and two sources of infection.
→