Science 1 Marks Question

Coconut fruit has fibrous outer coat, which helps it to float in water.

The given figure shows self-pollination, as the pollen grains from anther of flower are transferred to the stigma of the same flower.

The odd one out is rice.
In the above given pairs, rice reproduces by sexual reproduction but sugarcane, potato and rose reproduce vegetatively.

Fungus, moss and fern reproduce by the common method of spore formation which is a type of asexual reproduction.

Branch can be used to grow a new rose plant. As, rose reproduces by vegetative propagation. i.e. stem cutting method.

Flowers are colourful and fragrant to attract insects which help in pollination.

Sugarcane, potato and rose can be reproduced using stem or buds of the parent plants.

The scars present on a potato tuber are called eyes.

The process of fertilisation in plants occurs in the ovule.

After fertilisation, the ovary of a flower develops and becomes a fruit with seeds present inside.

Ovary is the part where fertilisation occur, i.e. male and female gametes fuse together.

Pollen grains have a tough protective coat which prevents them from drying up.

Unisexual flowers are those which contain either male or female reproductive part and bisexual flower has both reproductive parts (i.e. male and female) on the same flower.

The male reproductive part is stamen and the female reproductive part is pistil.

Sori is a yellow-brown cluster of structure that produces spores. They are usually found on the lower surface of the leaves of ferns.

(i) Spirogyra - Fragmentation
(ii) Yeast - Budding
(iii) Money plant - Vegetative propagation (stem cutting)

If the filament of Spirogyra is broken into fragments, then each fragment will develop into a new plant.

Sweet potato and Dahlia develops new plants through their roots by the process of vegetative reproduction.

Bryophyllum leaves reproduce asexually by vegetative propagation.

The process of reproduction is necessary for the perpetuation and preservation of species because it increases the number of members of species.

Formation of new, but similar individual is the characteristic feature of asexual reproduction.