race day shorts

Short day plants, which bloom when light duration is less than 12 hrs per day. Examples: Tobacco, Dahlia, hemp and cosm..

Race to the Moon - As soon as rockets could break away from the earth's gravity, moon became the next goal. Russians took the lead landing their spacecraft LUNA-3 which photographed the far side of moon in 1959. Meanwhile, the United States launched 11 unmanned moon missions without a sin..

Question 1 - Question: Rakesh Shukla is the Sports Captain of Kendriya Vidyalaya. The Sports Day is to be held on 21st Jan, which is two weeks away. He has to inform the house captains that they have to submit the names of the participants to him in a week's time. A student cannot take pa..

These plants flower in all possible photoperiods, ranging from a few hours to 24 hours of uninterrupted light exposure. They are also called photo neutrals or intermediate plants. Examples: Tomatoes, cucumbers, sunflower, dandelions and cotton. The terms long day/short day plant..

It inhibits flowering except in some short day plants where it promotes floweri..

W. W. Garner and H. A. Allards work on Maryland Mammoth, a variety of tobacco and Glycine max established the fact that it was the length of the day, which controlled flowering in these plants. Garner and Allard suggested the term photoperiodism to designate the response of organisms to t..

The plasma membrane of each B cell should be sensitised by contact with a specific antigen for the release of antibodies. The plasma cells do not migrate to the site of infection but act through the lymph. So they form the humoral immune system. The B lymphocytes are short lived and..

There is increasing evidence to suggest that a flowering hormone exists in plants. This is has been supported by a number of grafting experiments. A short day plant kept in long day conditions can be induced to flower, if a properly photo induced plant is grafted on it..

Flowering Hormone - There is increasing evidence to suggest that a flowering hormone exists in plants. This is has been supported by a number of grafting experiments. A short day plant kept in long day conditions can be induced to flower, if a properly photo induced pl..

Gibberellins cause stem elongation by affecting cell elongation. This can result in stem elongation of dwarf varieties (peas and maize) and rosette plants (cabbage). In the latter, it is called bolting. Causes leaf expansion Promotes fruit growth Breaks bud dormancy Breaks seed dorman..