Strategies for Enhancing Food Production – Green Revolution, Tissue Culture, Animal Husbandry, Apiculture Quiz - ICSE Class 12 Biology

Free practice quiz: Strategies for Enhancing Food Production – Green Revolution, Tissue Culture, Animal Husbandry, Apiculture (ICSE Class 12 Biology). 50 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. Which of the following is a key characteristic of the 'Green Revolution' in agricultural practices, distinguishing it from earlier agricultural advancements?

   1. Exclusive reliance on traditional, organic farming methods.
   2. Development and widespread adoption of high-yielding varieties (HYVs) of crops, coupled with improved irrigation and fertilizer use.
   3. Emphasis on monoculture of genetically unmodified staple crops with minimal technological input.
   4. Introduction of genetically modified organisms (GMOs) as the sole driver of increased productivity.
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   Answer: B. Development and widespread adoption of high-yielding varieties (HYVs) of crops, coupled with improved irrigation and fertilizer use.

   The Green Revolution was primarily characterized by the development and dissemination of high-yielding varieties of staple crops like wheat and rice, along with advancements in irrigation techniques, chemical fertilizers, and pesticides. While GMOs are a later development, they were not the defining feature of the initial Green Revolution.

2. The success of 'Mylta', a high-yielding variety of wheat developed during the Green Revolution, was largely attributed to its specific genetic traits. Which of the following best describes a crucial trait for a wheat variety to be considered 'high-yielding' in this context?

   1. Tall stature with long, weak straw.
   2. Photoperiod insensitivity and reduced height (dwarfing).
   3. Susceptibility to common rust diseases.
   4. Early flowering with a long grain-filling period under low light conditions.
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   Answer: B. Photoperiod insensitivity and reduced height (dwarfing).

   The development of semi-dwarf varieties (like those incorporating the Norin 10 gene) was revolutionary. Reduced height prevented 'lodging' (stems bending over), allowing plants to allocate more resources to grain production, and photoperiod insensitivity enabled them to grow in a wider range of latitudes and seasons, contributing significantly to high yields.

3. Animal husbandry practices aim to improve the productivity and well-being of farm animals. Which of the following is a key aspect of improving the 'breed improvement' strategy in cattle farming?

   1. Increasing the number of animals through uncontrolled breeding.
   2. Selecting animals with superior genetic potential for desired traits (e.g., milk yield, meat quality).
   3. Exclusively using indigenous breeds without any cross-breeding.
   4. Reducing the use of veterinary services to cut costs.
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   Answer: B. Selecting animals with superior genetic potential for desired traits (e.g., milk yield, meat quality).

   Breed improvement in livestock involves selective breeding, where individuals with the best genetic traits for desired characteristics are chosen for reproduction. This helps to enhance overall herd productivity and quality over generations.

4. The intensification of agriculture during the Green Revolution led to increased use of synthetic fertilizers. Which of the following is a potential negative environmental consequence of excessive nitrogen fertilizer use?

   1. Increased soil alkalinity.
   2. Eutrophication of water bodies due to nutrient runoff.
   3. Reduced atmospheric carbon dioxide levels.
   4. Enhanced microbial diversity in the soil.
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   Answer: B. Eutrophication of water bodies due to nutrient runoff.

   Excess nitrogen, often from fertilizers, can be washed into rivers and lakes through runoff. This leads to eutrophication, where excessive algal growth depletes oxygen, harming aquatic life. Denitrification processes can also release nitrous oxide, a potent greenhouse gas.

5. Which of the following is a key characteristic of the 'Surti' buffalo breed, originating from Gujarat, India?

   1. Very high milk yield but low fat content.
   2. Distinctive 'faciella' or 'flicker' horns curving backward.
   3. Exceptional meat quality and rapid growth.
   4. Extreme heat tolerance and drought resistance.
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   Answer: B. Distinctive 'faciella' or 'flicker' horns curving backward.

   The Surti buffalo is recognized for its medium build, distinctive sickle-shaped horns that curve backward, and good milk production with a reasonable fat content. It is a well-established breed known for its docility and adaptability.

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