CBSE Class 12 Biology Strategies For Enhancement In Food Production Cross Word

CBSE Class 12 Biology Strategies For Enhancement In Food Production Cross Word. Please refer to the examination notes which you can use for preparing and revising for exams. These notes will help you to revise the concepts quickly and get good marks.

BIOLOGY

CHAPTER: 9 - STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION (CROSS WORD)

[Figure: A crossword puzzle grid with numbered cells corresponding to Across and Down clues provided below.]

Across

2. method of praducing thousands of plants through tissue culture [1 Mark]

Answer:
1. Micropropagation
2. The method involves producing thousands of plants through tissue culture.

Teacher's Note:
a) Micropropagation is widely used for rapid vegetative propagation.
b) Plantlets produced through this method are genetically identical to the original plant (somaclones).

5. breeding between animals of same breed [1 Mark]

Answer:
1. Inbreeding
2. It refers to the mating of more closely related individuals within the same breed.

Teacher's Note:
a) Inbreeding increases homozygosity and helps in evolving a pure line.
b) Continued close inbreeding often reduces fertility and productivity, known as inbreeding depression.

6. technique to improve herd size [1 Mark]

Answer:
1. MOET (Multiple Ovulation Embryo Transfer Technology)
2. This technology is used for herd improvement and increasing the success rate of fertilization.

Teacher's Note:
a) MOET involves hormone administration to induce follicular maturation and superovulation.
b) High-yielding breeds are successfully multiplied using surrogate mothers.

7. a microbe rich in SCP [1 Mark]

Answer:
1. Spirulina
2. It is a single-cell protein source rich in high-quality protein and vitamins.

Teacher's Note:
a) Single Cell Protein (SCP) provides an alternative protein source for human nutrition.
b) Microbes like Spirulina can be grown easily on waste materials.

8. alternative sources of proteins for human nutrition [1 Mark]

Answer:
1. SCP (Single Cell Protein)
2. It serves as a rich alternative protein supplement to traditional agriculture.

Teacher's Note:
a) SCP helps reduce the environmental pressure of conventional livestock farming.
b) It includes proteins derived from bacteria, yeasts, and algae.

9. plants which have genetically identical to parent [1 Mark]

Answer:
1. Somaclones
2. Plants produced via tissue culture that are genetically identical to the parent plant.

Teacher's Note:
a) Somaclonal variation can sometimes occur during prolonged tissue culture.
b) These plants share the exact genetic makeup of the explant source.

Down

1. breeding crops with high levelnutrients [1 Mark]

Answer:
1. Biofortification
2. Breeding crops with higher levels of vitamins, minerals, and proteins.

Teacher's Note:
a) Biofortification aims to improve public health and combat hidden hunger.
b) It focuses on breeding crops with improved nutritional quality.

3. breeding of unrelated animals [1 Mark]

Answer:
1. Outbreeding
2. The breeding of unrelated animals which may be between individuals of the same breed or different breeds.

Teacher's Note:
a) Outbreeding helps overcome inbreeding depression.
b) It includes outcrossing, cross-breeding, and interspecific hybridization.

4. the capacity to generate a whole plant from any cell [1 Mark]

Answer:
1. Totipotency
2. The genetic potential of a plant cell to develop into a complete organism.

Teacher's Note:
a) Totipotency is the fundamental principle underlying plant tissue culture.
b) Explants are cultured on nutrient media containing carbon sources and growth regulators.