Agriculture: CUET Mock Test - 1 - CUET Humanities MCQ

The cross between a heterozygous parent with the homozygous recessive parent with respect to single trait is called monohybrid test cross. This is done to check whether an organism showing the dominant phenotype is homozygous or heterozygous.

Plot B is supplied with chemical fertilisers. Fertilisers do not make the soil rich in humus. Instead, manures enrich the soil with humus.

Cultivation practices and crop yield are related to weather, soil quality and availability of water. Since weather conditions, such as drought, and flood situations are unpredictable, varieties that can be grown in diverse climatic conditions are useful.

Neutralisation reaction occurs as the soil is acidic and the compound added is basic.
The following reaction that occurs:
Acid-clay + Ca(OH)₂ → Ca-clay + H₂O

Blue-green algae, also known as Cyanobacteria, are a group of photosynthetic bacteria that many people refer to as "pond scum." They have many beneficial functions such as nitrogen fixation and cycling of nutrients in the food chain.

Phototropism is the ability of a plant, or other photosynthesizing organism, to grow directionally in response to a light source.
Growth towards a light source is called positive phototropism, while growth away from light is called negative phototropism.

Agricultural diversification implies increasing the variety of agricultural commodities produced at the farm level. It can be done by changing the cropping pattern in favour of horticulture and floriculture crops.

All the instruments except composter are used to uproot the weeds. A composter is used to prepare compost from organic material.

Atrazine is a herbicide of the triazine class. Atrazine is used to prevent pre and post emergence of broad leaf weeds with crops such as maize (corn) and sugarcane.

Seed germination is the first step towards plant growth. The most common example of germination is the sprouting of a seedling from the seed of an angiosperm or gymnosperm.

• Insecticide is any pesticide used to kill, deter or control insects.
• Weedicide is a chemical agent that destroys unwanted plants, but not the wanted ones.
• Fungicide is a biocidal chemical compound or biological organism used to kill or inhibit fungi or fungal spores.

The detached twig or shoot is termed as scion. The scion usually contains two or three buds, although it may contain more. When the scion is only a single bud, the form of grafting is known as budding.

The modern combine harvester, or simply combine, is a versatile machine designed to efficiently harvest a variety of grain crops. It combines three separate harvesting operations—reaping, threshing, and winnowing—into a single process.

Pruning is done to remove the apical shoot tips to promote the growth of lateral buds, which makes the hedges dense.

The colourful part of the Sunflower or Marigold plant is inflorescence. An inflorescence has one main stalk, or peduncle. It may also bear numerous smaller stalks called pedicels, each with a flower at its tip. The arrangement of pedicels on a peduncle characterises different kinds of inflorescences.

Nagpuri is not a breed of cow. It is a breed of buffalo.
Nagpuri buffalo is a versatile breed of Maharashtra and stands better among the breeds of buffaloes which combine the milk and drought qualities.

It is a branch of horticulture which deals with the principles and practices of handling, packaging and processing of harvested crops to increase their storage life and availability. Vegetable crops are different from fruit crops. Post-harvest technology is a set of handling practices and applications that protect the quality of fresh fruits and vegetables from harvest until the time of consumption. Post-harvest technology is concerned with the study and application of methods to maintain the quality of harvested commodities to prevent losses.

• Fodder crop is used as an animal feed.
• Linseed and mustard are oil crops.
• Green gram is a legume crop.
• Berseem is mainly grown as a fodder crop.

For pH < 7, higher value of pH indicates a lower concentration of H⁺ ions. Hence, the higher the pH, the weaker the acid.
For pH > 7, lower value of pH indicates a higher concentration of H⁺ ions and lower concentration of OH^- ions. Hence, the lower the pH, the weaker the base.

The main goal of watershed management is to implant the sustainable management of natural resources to improve the quality of living for the population. The objective includes improvement and restoration of soil quality and thus, raising productivity rates.

Sugarcane crops needs maximum water per hectare. The 'crop water need', or crop evapotranspiration, consists of transpiration by the plant and evaporation from the soil and plant surface.

It requires high humidity with an annual rainfall above 100 cm and high temperature.

Amino acids are the building blocks of proteins. They band together in chains to form proteins. It is a two-step process: amino acids get together and form peptides or polypeptides. It is from these groupings that proteins are made. A total of 20 different kinds of amino acids form proteins. The kinds of amino acids determine the shape of the proteins formed. Commonly recognised amino acids include glutamine, glycine, phenylalanine, tryptophan, and valine.

Biochemical oxygen demand is the amount of dissolved oxygen needed by aerobic biological organisms to break down organic material present in a given water sample at certain temperature over a specific time period.

Drip system will be the best method to be adopted for watering fruit plants, gardens and trees. This system provides water to plants drop by drop and water is not wasted at all. Sprinkler system is best for sandy soil. Lever system and pulley system, being traditional methods, are less efficient.

Cell membrane is mainly composed of lipids and proteins. The major lipids are phospholipids that are arranged in a bilayer. Lipids are arranged within the membrane with the polar head towards the outer sides and the hydrophobic tails towards the inner part.
An improved model of the structure of cell membrane was proposed by Singer and Nicolson (1972) which is widely accepted as fluid mosaic model.
Though the membrane has carbohydrates in little quantities, they are not a major part of the membrane.

Frozen bull semen can be stored indefinitely if it is maintained constantly at very low temperatures. The critical temperature is approximately -112 degrees. Semen which is exposed to temperatures warmer than -112°F (even for a short time) and then returned to the storage tank may be damaged.

Different species of rose plants are propagated by different methods. They may be propagated by cutting, layering or grafting.

The edible part of cauliflower is the inflorescence which is head or capitulum and consists of a tightly packed aggregation of undeveloped white or creamy flower buds borne on the thick hypertrophied branches of the much-branched inflorescence. Typically, only the head is eaten. Cauliflower heads resemble those of broccoli, which differs in having flower buds. However, their economic parts consist not only of pure flowers but also the entire immature inflorescence or flower cluster. So, the edible part of cauliflower is inflorescence and not bud, leaves and fruit.

'Milch breeds', also known as 'milk breeds', are the cows of the breeds which produce high milk yields and in which male animals are slow or poor work animals. The examples of Indian 'milch breeds' are Sahiwal, Gir, Deoni and Red Sindhi. The milk production of these breeds is on average more than 1600 kg per lactation.