Question
- Trace the development of an endosperm after fertilisation with reference to coconut. Mention the importance of endosperm development.
- Write the importance of 'pollen bank'.
✓
Answer
- In coconut Primary Endosperm Nucleus (PEN-3n) undergoes successive nuclear divisions, give rise to free- nuclear endosperm known as coconut water, white kernel is the cellular endosperm, provides nourishment to the growing embryo.
- Storage/cryopreservation (storage in liquid nitrogen at - 196 o C), to use in crop breeding programmes.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
What name is given to the cells of inner cell mass, that have the potential to give rise to all tissues and organs in a human being?
A sugarcane plant has been affected by virus. How can a virus-free cane be developed from it? Explain the procedure.
Name the hormone that maintains the functions of male accessory ducts and glands.
Which one of the two in-situ or ex-situ biodiversity conservation measures help the larger number of species to survive? Explain.
It has been recorded that the temperature of the earth’s atmosphere has increased by O.6C.
- What has caused this increase?
- Explain its consequences.
Study the given pedigree chart and answer the questions that follow:
- Is the trait recessive or dominant?
- Is the trait sex-linked or autosomal?
- Give the genotypes of the parents shown in generation I and of their third and fourth child in generation II.
What is the basic principle of vaccination? How do vaccines prevent microbial infections? Name the organism from which hepatitis B vaccine is produced.
In certain simple plants, why are male gametes produced in large numbers as compared to the female gametes? Is it applicable in animals also? Yes or not.
Refer to the figure given below and answer the questions that follow:
- Recognize and explain the process by which Tasmanian wolf evolved.
- Give one example of an animal that has evolved along with Tasmanian wolf.
- Compare and contrast the two animals shown?
Recently a girl baby has been reported to suffer from haemophilia. How is it possible? Explain with the help of a cross.