Explore topic-wise InterviewSolutions in Current Affairs.

Watering of crops at regular intervals is called irrigation. The time and frequency of irrigation depend on types of crop, soil and season. In summer, the frequency of watering is higher because in summer temperature is high due to which the rate of evaporation of water from the soil and the leaves increases.

IgG antibody can even cross placenta to reach embryo.

Correct answer is (d) 15%

85% percentage of world population has Rh positive blood.

Organ donation has been highly useful in saving many lives. Organs from a live donor or from a dead donor can be successfully transplanted in a needy patient. A live donor can donate kidney, liver and bone marrow. Many organs can be used for transplantation from a dead body. Organs of a brain dead person can be harvested for transplantation. Now-a-days, organs from road accident victims are utilized for this purpose. For this, consent of the dead person’s relatives is mandatory. In our country, there is a huge waiting list of patients who need organs from donors. 

Significance of Organ Donation: 

• Many patients are in urgent need of organ transplant. 
• Thousands die for lack of suitable donor. 
• Organs of many brain dead patients remain unutilized and go waste. 
• There is lack of awareness about organ donation. 
• Huge gap in demand and supply gives rise to illegal racket of organ transplant.

IgE antibody is present on mast cells.

Gamma globulin.

(b) June to September

Correct answer is (a) Protein

The protein which is produced by B-lymphocytes in response to an antigen and can specifically interact with the antigen. This interaction depends on specific structure of antigen and is at the root of immune system. In other words, antibody-antigen reaction forms the basis of immune system. Antigen is also called immunoglobin (Ig), Antibodies are gamma globulin (γ-globulin) protein produced by plasma cells. The part of antibody which reacts with antigen is called paratope.

Correct answer is (a) IgE

Correct answer is (c) Monkey

(b) drip system

The preparation of soil is the first step before growing a crop. The soil is prepared for sowing the seeds of crop by ploughing, levelling and manuring. The process of loosening and turning the soil is called ploughing. It is done by using a tool called plough. It is made up of wood or iron. One of the important task in agriculture is to turn the soil and loosen it. It allows the roots to penetrate deep into the soil so that plants are held more firmly to the soil. The ploughed field may have big pieces of soil called crumbs. It is necessary to break these crumbs with a plank. The levelling of ploughed soil is done by using an implement called leveller. Sometimes, manure is added to the soil before tilling. This helps in proper mixing of manure with soil. Once the soil is ploughed, levelled and manured, it is ready for sowing of seeds.

Following are the four steps of destruction of antigen: 

(a) Differentiation between internal and external antigens. 

(b) Formation of plasma cells by B-lymphocyte cells according to the antigenic determinant present on external antigen. 

(c) Formation of specific antibodies by plasma cells. 

(d) Destruction of antigen by antigen- antibody reaction and by cell mediated immunity (CMI).

Correct answer is (b) Two

(d) Any of these

6000 Dalton.

A chain of about 6 to 8 amino acids in a protein work as antigenic determinant. A protein may have many antigenic determinants. Number of antigenic determinant in a protein is called the valency of antigen. In most of the bacteria, the antigenic valency can be 100 or even more.

Seed drill, because it is a modern agricultural implement unlike the others which are all traditional tools.

c) Plough, Hoe, Cultivator

Growing different crops alternately on the same land is technically called Crop Rotation.

C. sprinkler irrigation system 

Sprinkler system is more suitable for uneven land where sufficient water is not available.

Levelling of soil is done with the help of an equipment called leveller. Levelling beneficial for sowing as well as for irrigation.

The food which is grown organically is harmless and healthier because organic foods are grown without the use of chemical fertilizers and pesticides.

Nowadays plowing on large scale is done by cultivator. A cultivator is a tractor-driven machine. It cost effective and also saves time. The use of cultivator saves labour and time.

∵ 1 mole of any species contain = 6.022 x 10²³ of that species

∴ 5 mole of Hydrogen atom contains = 5 x 6.022 x 10²³ Hydrogen atom

= 3.011 x 10²⁴ Hydrogen atom

Condition for closed environment:

1. When the temperature increases, the pressure of air also increases. 

2. For example, as the air warms up, the molecules in the air become more active. 

3. They use up more individual space even though there is same number of molecules. T1 s causes an increase in the air pressure.

1. Sea water is salty due to minerals in it. Whereas it is absent in well or a lake water. 

2. Due to presence of salts, density of seawater is more than well or lake water, so it is easier to swim in the sea than in a well or lake.

i. True

ii. False. 

Sea water is a good conductor of electricity

iii. True

iv. True

To obtain water for making steam for turning turbines and for cooling spent steam to condense it back into hot water for making fresh steam.

Biodegradable waste consists of mainly human and animal waste.

Two Aspects to be Supported: 

1. India always maintained her dignity and image of a peace-loving country by taking initiatives to bring about equality and understanding among the nations i.e. India supported to end Korean War in 1953, French rule in China, US role in Vietnam. 

2. India’s initiatives for Non-alignment are also appreciable for the maintenance of mutual understanding and security. During the post-cold war era also, NAM had become an effective tool to make the Security Council more effective and democratic. 

 Two Aspects to be Changed: 

1. In the course of the decade of 1962-72, India faced three wars and its peaceful image played a very limited role. 

2. Conflict with neighboring countries like China and Pakistan derailed India’s concept of regional co-operation under SAARC. 

Hence, India must adopt diplomatic and defensive postures in its foreign policy to maintain its independent entity.

Correct option is  A) 2

Correct option is  C) sp³ 

Correct option is A) molecule

An adventure is a dangerous and exciting experience. Love of adventure is an innate quality. It is with the person from his birth. Gordon Cook was the descendent of Capt. James Cook, who had taken up round the world voyage 200 years ago. So Gordon had this quality in his blood. Young Swinburn’s climb of Culver Cliff in the isle of Wight is an act of courage. People involve in such acts of courage because of their love for adventure.

This is a nature’s gift to the person. This longing to succeed in life has to be satisfied. One should take precaution that such acts of courage do not harm others. We should not indulge in such activities at the cost of others. The instinct is noble. It strengthens man’s character. It develops in him the qualities of determination. It enlivens their spirit. Gives them endless happiness. Such people should always be encouraged by us. There are risks involved. But such achievements are rare and are never overlooked.

During the Holi fire, the temperature of the air just above the fire becomes much greater than that of the air further up. The hot air has lower density (mass per unit volume) and lower refractive index. It becomes an optically rarer medium. The cool air has higher density and higher refractive index. It is an optically denser medium relative to hot air. Hence, in refraction of light, the angle of refraction changes continuously due to a continuous variation in refractive index.

As the physical conditions of air change rapidly, the apparent position of an object fluctuates rapidly. This gives rise to the flickering of an object seen through a turbulent stream of hot air rising above the Holi fire.

(a) Size of the pupil increases

He has recovered completely. 

(C) He should guard against danger

I saw a one-eyed man. 

The students talked about the weather.

(C) committee

It snows heavily in winter in Shimla.

Correct answer is (A) time^-1

(B) Synthetic rubber

Correct answer is (A) K₂SO₄

Correct answer is: (a) lactic acid