(a) (i) What are spores ? On which structures are they formed ? How do they overcome unfavourable conditions…
(a) (i) What are spores ? On which structures are they formed ? How do they overcome unfavourable conditions ? Name the organism which multiplies with the help of these structures.
(ii) Give two reasons why some plants are grown by the method of vegetative propagation. List two methods used to grow plants vegetatively.
OR
35. (b) (i) Study the diagram given below and name the parts marked as A, B and C. What happens when B reaches C in the ovary ? Mention its significance.
(ii) Write the post fertilisation changes that occur in a flower.
Solution
(a)(i)
Spores are reproductive structures that detach from the parent and give rise to a new individual.
Sporangium / Sporangia
Covered by thick walls to protect them from unfavourable conditions.
Rhizopus
(ii)
Plants which have lost the capacity to produce seeds.
Plants bear flowers and fruits earlier so as to reduce time.
To get genetically similar plants.
(Any two or any Other)
Methods
Layering and Grafting
(Or any other)
