Science 5th Class English Medium Chapter 3 Online SHort Questions with Answers Preparation

Question # 1

Ans 1: Maize is a monocot platn i.e. there is one cotyledon in the seed. The maize seed is oval and flat in shape, Its external covering is in the form of a thin seed coat. There is an endosperm inside the seed, where food is stored. The embryo of maize seed consists of one cotyledon, a radicle and a plumule.

Question # 2

Question # 3

Ans 1: If pollen grains transferered from the anther of flower to the stigma of the same flower it is called self pollination. It takes place in pea, cotton and tomato etc.

Question # 4

Ans 1: The germination of seed is a process is which a seeding comes ou of the embryo.

Question # 5

Ans 1: The flower has four parts. These occur in the form of four whorls. The four parts of flower are sepals, petals, slaments and carpel

Question # 6

Ans 1: Self pollnation:
If pollen gains are transfeered form the anther of a flower to the stigma of the same flower. It takes place in pea, cotton and tomato etc.
Ans 2: Cross polination: if pollen grains are transferred from the flower of one plant to the stigma of the flower of another plant. It is called cross pollnation. It takes place in maize, papaye, rose etc.

Question # 7

Ans 1: In asexua reproduction only one plant produces new plants. Flowers do not take partin this type of reproduction. The other parts of the platne.g. root, stem, and leaves give rise to new plant.The plants produced from these parts have a great similarity with the parent plant.

Question # 8

Ans 1: The outer covering of seed is called seed coat. It protect the tiny embryo whihc is present inside seed. There is a ore on seed coat. It is called micropyle. Embryo consists of cotyledons.,Which store food. The axis of embryo is between the two cotyledons. The end of axis towards the pointed end of seed is called radicle. When seed germinates , ists radicle form roots. The other end of the axis is called plumule. It gives rise to the shoot.

Question # 9

Ans 1: There are two types of pollnation.
i- Self pollination ii- Cross pollination.

Question # 10