Ch-12 Questions 60 to 80

Chapter-12

Reproduction in Plants

Sr NO.	Question	Answer
60.	What is Pollination?	The transfer of pollen from the anther to the stigma of a flower is called pollination.
61.	What is self-pollination?	If the pollen lands on the stigma of the same flower it is called self-pollination.
62.	Give name of two plants which reproduce by means of Spores?	Moss and Ferns.
63.	What is cross-pollination?	When the pollen of a flower lands on the stigma of another flower of the same plant, or that of a different plant of the same kind, it is called cross-pollination.
64.	The cell which results after ____ of the gametes is called a zygote.	Fusion.
65.	The cell which results after fusion of the gametes is called a______.	Zygote.
66.	What is fertilization?	The process of fusion of male and female gametes (to form a zygote) is called fertilization.
67.	The zygote develops into an______.	Embryo.
68.	After fertilisation, the _____ grows into a fruit and other parts of the flower fall off.	Ovary.
69.	The fruit is the _____ ovary.	Ripened.
70.	The seeds develop from the _____.	Ovules.
71.	The seed contains an _____ enclosed in a protective seed coat.	Embryo.
72.	Give three examples of fleshy fruits.	Mango, Apple and Orange.
73.	Give two examples of hard fruits.	Almonds and walnuts.
74.	How some kind of plants grow at different places?	This happens because seeds are dispersed to different places.
75.	When you visit a forest or park or field why seeds of fruits will stick to your clothes?	It is a method adopted by that plant to disperse its seeds to different place and thus enable the seed to sprout in convenient place with sufficient sunlight, water, air and nutrients.
76.	What do you think will happen if all seeds of a plant were to fall at the same place and grow there?	There would be severe competition for sunlight, water, minerals and space. As a result the seeds would not grow into healthy plants.
77.	What are the benefits earned by a plant with proper disbursal of its seeds?	Plants benefit by seed dispersal. It prevents competition between the plant and its own seedlings for sunlight, water and minerals. It also enables the plants to invade new habitats for wider distribution.
78.	Seeds and fruits of plants are carried away by______, ______, _________.	Wind, water and animals.
79.	How winged seeds are disbursed?	Winged seeds blown off with the wind to far away places.
80.	Give names of plants which disburse its seeds via wind.	(a). Drumstick. (b). Maple. (c). Light seeds of grass. (d). Hairy seeds of aak (Madar). (e). Hairy fruits of Sunflower.