Test: Improvement In Food Resources- 2 - Class 9 MCQ

Indian cattle are a specific breed of cattle found in India. Let's analyze each option:
(i) Bos indicus: This is a scientific name for the Indian zebu cattle, which are commonly found in India. They are characterized by a hump on their back and large ears. This is a correct answer.
(ii) Bos domestica: This is not a specific breed of cattle. It is a term used to refer to domesticated cattle in general. This is not an Indian cattle.
(iii) Bos bubalis: This is a scientific name for the water buffalo, which is commonly found in India. Water buffalo is considered as Indian cattle. This is a correct answer.
(iv) Bos vulgaris: This is not a specific breed of cattle. It is a term used to refer to the wild ancestor of domesticated cattle, known as Aurochs. This is not an Indian cattle.
Answer: Indian cattle breeds are (i) Bos indicus and (iii) Bos bubalis.

In India, as in many other agriculture-based countries, farming ranges from small to very large farms. Different farmers thus have more or less land, money and access to information and technologies

Canals: This is usually an elaborate and extensive irrigation system. In this system canals receive water from one or more reservoirs or from rivers. The main canal is divided into branch canals having further distributaries to irrigate fields
Correct Answer:
- A: To irrigate fields

Tanks are described as small storage reservoirs that intercept and store the runoff from smaller catchment areas, ensuring water is retained for various uses. They are not natural lakes, underground channels, or artificial canals.

Canals receive water from:

• Rivers: Canals often divert water from rivers to distribute it for irrigation or navigation.
• Reservoirs: These are man-made lakes that store water, which can be released into canals as needed.

This makes option C the correct answer since canals can receive water from one or more reservoirs or rivers, providing a controlled water supply for various uses.

Correct Answer:
c) competing for various resources of crops (plants) causing low availability of nutrients

Explanation:

Weeds primarily affect crop plants by competing with them for essential resources such as nutrients, water, and sunlight. This competition can result in the crop plants receiving insufficient resources for optimal growth and development, ultimately reducing their yield.

• Option a: Although weeds may interfere with the growth of crops, the phrase "killing of plants in field before they grow" is not an accurate or common description of how weeds affect crops.

• Option b: The statement "dominating the plants to grow" is ambiguous and does not clearly describe the competitive nature of weeds.

• Option c: This accurately captures the primary mode of interference—competition for resources—which leads to a lower availability of nutrients and other vital resources for the crop plants.

• Option d: Since options a and b are not correct, this option is not applicable.

Thus, the correct answer is c).

- Catlas fish feed on the surface of the water body.
- They primarily consume floating food items and plankton found near the water's surface.
- This feeding behavior helps them target their prey efficiently.

Intervarietal hybridization is the process in which parents involved in hybridization belong to the same species but different varieties. For example, crossing of two varieties of wheat or other crops. Interspecific hybrids are bred by mating two species, normally from within the same genus but different species.

The system of culturing several species of fish together is known as composite fish culture. This method involves:

• Using five or six species of fish with different food habits.
• Maximising the use of available food resources in a fishpond.
• Reducing competition for food among the fish.

Composite fish culture improves yield by making efficient use of the pond ecosystem.

Continuous use of fertilisers can negatively impact soil fertility due to several reasons:

• Organic matter is not replenished, leading to nutrient depletion over time.
• Soil microbes are harmed, which disrupts the natural nutrient cycle and soil health.