CBSE Class 12 Biology Strategies For Enhancement In Food Production Study Guide

Download CBSE Class 12 Biology Strategies For Enhancement In Food Production Study Guide in PDF format. All Revision notes for Class 12 Biology have been designed as per the latest syllabus and updated chapters given in your textbook for Biology in Standard 12. Our teachers have designed these concept notes for the benefit of Grade 12 students. You should use these chapter wise notes for revision on daily basis. These study notes can also be used for learning each chapter and its important and difficult topics or revision just before your exams to help you get better scores in upcoming examinations, You can also use Printable notes for Class 12 Biology for faster revision of difficult topics and get higher rank. After reading these notes also refer to MCQ questions for Class 12 Biology given our website

Strategies For Enhancement In Food Production Study Guide Class 12 Biology Revision Notes

Class 12 Biology students should refer to the following concepts and notes for Strategies For Enhancement In Food Production Study Guide in standard 12. These exam notes for Grade 12 Biology will be very useful for upcoming class tests and examinations and help you to score good marks

Strategies For Enhancement In Food Production Study Guide Notes Class 12 Biology

Q A person was born without thymus gland but otherwise normal .Mention any four ways the person is likely to suffer due to its absence .

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Definitions

ANIMAL BREEDING :- Mating or crossing of animals to improve the desirable qualities and yield or produce.


ANIMAL HUSBANDRY :- The agricultural practice of breeding and raising livestock e.g. buffaloes, cows, pigs, horses, sheep, camel etc including poultry and fisheries.


APICULTURE :- Bee keeping for production of honey.


BREED :- A group of animals related by descent and similar in most characters, like appearance, features, size, configuration etc.


DAIRY FARM MANAGEMENT :- The management of animals for milk and its products for human consumption.


FISHERIES :- An industry devoted of rearing, catching, processing or selling of fish, shellfish or other aquatic animals.


GREEN REVOLUTION :- Dramatic increase in food production in mid 1960s as a result of cultivation of high yielding disease resistant varieties of wheat, rice and maize etc developed through breeding techniques is referred to as green revolution.


MUTATION BREEDING :- Obtaining crop plants with desirable characters by artificial or induced mutations and using them a material in breeding programmes is called mutation breeding.


PLANT BREEDING :- The purposeful manipulation of plant species (Crop) to create desired plants best suited for cultivation, give better yields and are disease resistant.


SCP OR SINGLE CELL PROTEINS :- Industrially or commercially produced edible proteins by culturing suitable micro organisms on large scale for nutrition for animals and human beings.


SOMACLONES :- Genetically identical organisms or plants derived from single organisms through micro propagation are called somatic hybrid e.g. Tomato protoplast and potato protoplast.


TISSUE CULTURE :- Growing whole plant from a part of plant such as leaf, root, pollen etc by growing these on an artificial nutrient medium under aseptic conditions is called tissue culture.


TOTIPOTENCY :- The quality of isolated cells or tissue of an organism by virtue of which it can generate the whole of organism is called totipotency.


Assignment Questions


LEVEL 1

1.During a meristem culture some explants were kept in culture medium conrtaining more of auxins than cytokinins. Which organ of the plant is expected to differentiate from the callus?

2.Why hybrids of selected parents are self pollinated till a state of homozygosity?

3.To which product is blue revolution related?

4.Following are the steps in a particular process. Name the process and fill in the steps that are given as blanks.

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5.Artificial insemination is a better approach than natural mating. Justify?

LEVEL 2


1.Clones are identical each other ?Is there any social implications of human cloning?

2.A technique by which cattle herd is increased in number in short period of time.name and describe it.

3. Why do we use apical and axillary meristems for tissue culture?

4. If your family owned a dairy farm, what measure would you undertake to improve the quality and quantity of milk production?

5. Biofortification can solve the problems of ―hidden hunger‖ to a large extent. Prove it? 

6. Insect/pest resistance in plants can be due to morphological, chemical or physiological features. Give one example each of the features and the species n which it is found?


LEVEL 3

1.What is reference material for comparison of any improved variety?
2.For which amino acid maize is biofortified?
3. Some time the disease resistance gene is present in the wild relative of crop plant. Give an example of crop plant where the resistance gene is present in its wild relative and name the wild relative
4.Two different plant of the same species, each with a different desirable trait are crossed to produce a hybrid that will have both the desirable character of the two parents. But, what are the drawbacks in the process of hybridisation of the selected parents?

Questions for Self Evaluation

Q1 What is interspecific hybridization ?
Q2 What should be done when inbreeding depression becomes a problem ?
Q3 Name any five hybreed varieties of crop plants which have been developed in India .
Q4 What are the commonly used growth regulators in plant tissue culture ? What for they are required ?
Q5 Define germplasm . How is it maintain ?

 

Definitions

• BIOCHEMICAL OXYGEN DEMAND (BOD) :- The amount of the oxygen that would be consumed if all the organic matter in 1 ltr. Of water were oxidized by bacteria.
• BIOCONTROL :- The use of biological method for controlling plant disease & pests.
• BIOFERTILISER :- The organisms that enrich the nutrient quality of the soil.
• BIOGAS :- The mixture of gases {mainly CH4, CO2} produced by the microbial activity & which can be used as fuel.
• BT COTTON :- A variety of cotton which is incorporated with Bt gene and it is resistant for insects & pests.

 

CLOT BUSTER :- The microbial product for removing clots from the blood vessels of patients who have undergone myocardial infraction leading to heart attack.
FERMENTATION :- The process of Anaerobic respiration in which complex molecules incompletely breaks into simple one by the microbial action.
FERMENTORS :- The large containers made up of stainless steel require to grow microbes for industrial products.
METHANOGENS :- The anaerobic bacteria which produce large amount of CH4, CO2 & H2 as they grow on cellulosic material.
MYCORRHIZA :- A symbiotic association between fungal hyphal & roots of trees (Higher Plants)
PEST :- Organism that destroys crop or its product is known as pest.
SEWAGE :- The Municipal waste – water containing large amount of organic matter & microbes

Assignment Questions

LEVEL 1

1.Fungi associate with higher plant roots absorb phosphorus from the soil passes it to the plant. Mention the association between them
2. What is the key difference between primary and secondary sewage treatment?
3.How are the holes (spongy texture) produces in bread and cheese?
4.What is ―Anaerobic Sludge digest‖?

LEVEL 2

1.Do you think microbes can also be used as energy convertors? If yes how?
2. Single cell protein is one of the alternative source proteins for animal and human nutrition. Justify your answer.
3.Bottled juices are clearer compare to homemade juices. Give reason?
4. For the brain haemorrage of a patient, the doctor prescribed Streptokinase. Why? Mention the source of industrial production of this biomolecule.
5.What is cyclosporine A? Name the micro organism from which it is obtained. How it is used in human welfare?
6.. Why is organic farming favoured these days? Describe the method employed in the process.

LEVEL 3

1.Some Microbes are used to control other microbes , elaborate with examples
2. Why are most of the antibiotics sold in combination with lactobacillus, these days?
3. The Yamuna action plan and the Ganga action plan have been initiated to reduce BOD of these rivers in and around Delhi. What is understood by this statement?
4.Drinks like whisky and rum more intoxicating than wine. Why?

Questions for Self Evaluation

Q1 Which gas gives the puffed appearance to the dough ? Name the metabolic pathway taking place Resulting in the formation of this gas .
Q2 What is the key difference in the primary and secondary treatment ?
Q3 Describe the bio gas plant structure . Give various steps involved in obtaining biogas .
Q4 Why are chemical pesticides not preferred by the farmers in controlling pests ?
Q5 What is the advantage of ―Legume –Rhizobium ― symbiosis


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