(a) Do all pollen grains remain viable for the same length of time ? Support your answer with two suitable examples.

i. In an activity, when any of the following occurs, it suggests that a chemical reaction has taken place: a. change in state b. change in colour c. change in temperature d. evolution of...

In a 3-celled pollen, the generative cell has already divided and formed 2male gametes. Hence, it will not divide again in the pollen tube. Since ina 2-celled pollen, the generative...

Social justice involves end of exploitation of any person at the hand of another person. There are three important functionaries in a market, i.e. producer, consumer and worker. In a...

Dietary supplement in heavy dose for longer duration of time is very harmful to our body. It damages some of the internal organs, such as liver and may leads to...

(i) In the solar cells, the energy is obtained only during the day, when the Sun shines. (ii) In the solar cells, the solar- panel convert solar energy into electricity, which is...

(i) Keeping into view the disadvantages and rising resistance against the multipurpose dams, water harvesting is considered viable alternative both socioeconomically and environmentally.  (ii) For example, Rainwater harvesting is the most...

(i) The frog (ii) The Nightingale (iii) The speaker refers it as poor because she is dead (iv) She died when the veins of her neck bursted.

1. Excess calcium in diet for longer time can cause heart diseases/ formation of stones in kidney.  2. Excess iron causes siderosis (vomiting and headache)  3. Vitamin E can cause prostates cancer

(i) Munshi Premchand drew tradition of Kissagoi storytelling. His novels are filled with all kinds of powerful characters, drawn from all levels of society. (ii) His novels include characters such as...

(i) Indulekha: It is a hotly debated novel and the concerns it addresses are of marriage practices of upper-class Hindus in Kerala. (ii) Potheri Kunjambu a 'lower caste' writer from North...