Necessary Conditions for Seeds to Germinate
Seeds need sufficient food for germination, which they get from cotyledons. Following environmental conditions are necessary for seed germination:
Moisture or Water:
- i) Seed absorb water and swell up, which cause seed coat to burst. This help the root to emerge out.
- ii) Water also help the enzymes to activate themselves to digest the food of seed.
iii) Water also helps to elongate hypocotyle and epicotyle to grow out.
Air:
- i) Germinating seed need a lot of energy for growth.
- ii) Air is very important for germination as it contains about 21% of oxygen.
Suitable Temperature:
- i) Germination occur in temperature range of 5-30°C. However best temperature range is 25-30°C.
- ii) This range of temperature of very necessary for the enzymes to function.
Note: At the end of the half-year or in its middle (depending on the university), extramural students come to the institute for a session. Plus distance learning is that the student gets almost complete freedom of action. He can stay at home for a month at work or, for example, get a job to pay for his studies. In most Russian universities it is more than two times cheaper than full-time education. By correspondence, usually those who do not want to spend time attending lectures and university study . As a rule, these are people who have a permanent job, who are retraining or are receiving additional education. If a student is officially employed, he is given a certificate stating that during the session he has the right not to come to work. In some universities, the correspondence form is a way to avoid expulsion from the university, since the requirements for students are much lower than on full-time education. Students with a disastrous failure usually offer a transfer to the correspondence department with preservation of the specialty and results of the passed disciplines. The first session for part-time students is for familiarization. On it you can get the minimum material necessary for passing the exams, the timetable is covered, the first lectures and practical classes are conducted.