Effluent from the primary settling tank passed into aeration tank, agitated mechanically and air is pumped into it, vigorous growth of aerobic microbes into flocs, microbes consume major part of the organic matter in effluent.

It is the process by which semen of a good pedigree bull is collected and stored at freezing temperature and finally introduced in the vagina of a number of good female cows by artificial means during the heat or oestrous period of the females.

Streptococcus
Streptokinase functions as a clots from the blood vessels of patients who have suffered myocardial infarction.

Smack is obtained from Papaver somniferum. It affects the Central Nervous System (CNS) and gastrointestinal system. It slows down the body functions. It acts as a depressant.

1. Ganga action plan was initiated by the ministry of environment and forest in order to save the holy river Ganga from pollution. Under this plan it has been proposed to build a large of sewage treatment plant so that only the treated sewage is discharged
into the river.
2. Industries may release their effluents and waste only after their proper treatment.

The process of breeding crops for higher level of vitamins and minerals, higher proteins, healthier fats, to improve public health is known as biofortification.
It helps to improve:
(i) Protein content and quality;
(ii) Oil content and quality;
(iii) Vitamin content: and
(iv) Micronu ient and mineral content. 
IARI has released several vegetable crops that are rich in vitamins and minerals. e.g. Vitamin A enriched carrots, spinach, pumpkin, vitamin C enriched bitter grourd, bathua, mustard, tomato, iron and calcium enriched spinach and bathua, protein enriched beans-lablab, broad, French and garden pea.

Colostrum, rich in nutrients, rich in antibodies / rich in IgA/ provide passive immunity / provides immunity to new born / helps to develop resistance in new born / readily available for new born / hygenic / develops a bond between mother and child.
Breast-feeding is recommended during the initial period of an infant's growth as:
(a) It provides passive immunity to the baby through colostrum
(b) It provides a balanced nutrition to the baby.
(c) Also, it protects baby from allergens

Fermentation is the process of conversion of carbohydrates to alcohol and CO₂ by some microorganisms in the absence of O_2.  Microbes via fermentation are utilised for the synthesis of a number of produce valuable for human beings.
Some of the applications of microbes are:
(i) Production of bread using baker's yeast.
(ii) Microbes are used to ferment fish, soybean bamboo shoots, etc.
(iii) Different varieties of cheese are produced by fermentation via microbes.
(iv) Wine, beer and other alcoholic drinks are also produced by fermentation.
(v) Vinegar is also produced by fermentation.

1. Sugarcane. grown in North India is Saccharm barberi. It has poor yield and poor sugar content.
2. Sugarcane grown in South India is Saccharm officinarum. It has Thicker stem and high sugar content. This species cannot be grown in North Indian conditions.
3. They were successfully cross by plant breeding to obtain hybrid varieties having following desirable characters:
(i) high yield
(ii) Thick stem
(iii) High sugar content
(iv) ability to grow in North-Indian conditions.