Explore topic-wise InterviewSolutions in Current Affairs.

Cerebrospinal fluid is about 120 ml in adult human being.

The brain is covered by a tissue called cranial meninges which consists of three layers of tissues: outer dura mater, middle arachnoid and inner pia mater.

The potential difference in charge on either side of the plasma membrane of a resting neuron is called as the resting potential.

Neuroendocrine system is an integrated and coordinated system consisting of nervous and endocrine system which brings about the coordination of the body.

There are 12 pairs of cranial nerves.

Limbic system is involved in the regulation of sexual behavior, expression of emotional reactions and motivation.

Occipital lobe carries sensory visual area which is concerned with the sense of sight. Association visual area is concerned with perception, analysis and storing of information obtained by sight.

The areas concerned with sense of taste, sense of hearing and sense of smell are located on temporal lobe.

General sensory areas concerned with sensation of temperature, touch, pressure, pain and speech are present in the post central gyrus.

The people thought that the dead person’s bond with family should not get cut off after death.

i. Farmers in the village-settlements were producing surplus food. 

ii. Therefore, they needed skilled craftsmen for making agricultural implements and repairing them.

1. In the agricultural system, it became possible to store foodgrains for a long period. 

2. There was sufficient food for the community. 

3. Therefore, women and men began to get spare time to use their natural creativity to develop special skills.

1. As the food available was more than needed by the community, some men and women utilised their spare time in experimentation and for using their natural creativity to develop special skills. 

2. Persons with such special skills were given to work based on those skills. 

3. Thereby a class of skilled craftsmen emerged.

Craftsmen were needed for tasks like making agricultural implements and repairing them.

The craftsmen were paid in the form of food grains or other articles.

(i) Archaeological evidence shows that agriculture first began about 11,000 years ago in Israel and Iraq.

(ii) The houses at the beginning of the New Stone Age were made of wattle and daub.

1. nature, deities 

2. rules, customs 

3. food 

4. spare 

5. special

Agriculture was the main source of livelihood for the people in the New Stone Age.

People began to worship nature and various deities to grow good crops.

Global Warming: An increase of CO₂ in the atmosphere increases global temperatures. This is called global warming.

1. Human beings live along with a large community of plants and animals. 
2. It snows heavily in the northern countries during winter. 
3. In the region of the north pole, the sun is visible during the nighttime also. 
4. The sun illuminates one-half of the earth at any given movement. 
5. Rotation helps the entire earth to get heat and light on a daily basis. 
6. The earth revolves around the sun while rotating around its own axis

The concept of immunological surveillance postulates that the primary function of the immune system is to “seek and destroy” malignant cells that arise by somatic mutation. The efficiency of the surveillance mechanism reduces either as a result of ageing or due to congenital or acquired immunodeficiencies, leads to increased incidence of cancer. Thus, if immunological surveillance is effective, cancer should not occur. The development of tumour represents a lapse in surveillance.

Prevention of AIDS is the best option. Advocating safe sex and promoting regular check-up, safe blood for transfusion, use of disposable needles, use of condoms during sexual contact, prevention of drug abuse, AIDS awareness programme by NACO (National AIDS Control Organisation), NGOs (Non Governmental Organisations) and WHO are to prevent the spreading of AIDS.

Cotyledons, store food (for growth of embryo of the seed)

Coleoptile, protecting the shoot apex / plumule.

(a) Amoebiasis is usually transmitted by the following ways: 

1. The faecal-oral route. 

2. Through contact with dirty hands or objects. 

3. By anal-oral contact. 

4. Through contaminated food and water.

(b) Symptoms of malaria: 

1. Fever accompanied by shivering. 

2. Joint pain or arthralgia. 3. Vomiting. 

4. Anaemia caused due to rupture of RBCs or haemolysis. 

5. Haemoglobinuria.

(c) 1. Unsafe and unhygienic food and drinks contaminated with the eggs of Ascaris are the main mode of transmission. 

2. Eggs hatch inside the intestine of the new host. 

3. The larvae pass through various organs and settle as adults in the digestive system.

(d) 1. Pneumonia usually spreads by direct person to person contact. 

2. It is also spread via droplet infection, i.e. droplets released by infected person. 

3. Using clothes and utensils of the patient.

Mast cells release chemicals like histamine and serotonin in allergic response

1. Drinking clean water.

2. Periodic cleaning and disinfection of water tanks and reservoirs.

Correct answer is (b) Blowing nose in open

Heat Balance: The Earth with its atmosphere radiates back some of its insolation. This balances the temperature on the earth.

When a body gives out energy it is called radiation.

a) I find no other reason.

b) When inversion occurs cold air underlies warmer air.

The chemicals like histamine and serotonin are released from mast cells. These chemicals cause the exaggerated response of minimum system called allergy response.

D) All the above

Parthenocarpy can be induced through the application of growth hormones and such fruits Are seedless. Since banana produces fruit without fertilisation, it is considered a good example of Parthenocarpy.

The radiation received on the surface of a body is called insolation.

(i) Antibody: lgE.

Chemicals: Histamine & serotonin. The antibody (lgE) cause the release of these chemicals from mast cells.

(ii) Drugs: Antihistamine (citizen, Avil-25/50), Adrenalin and steroids, quickly reduce such symptoms of allergy

D) All the above

If the insolation received at the equator (0°) is 100 units, then the number of units at 661/2° (Arctic circle) is 50.

(B) November – December

D) All the above

Maximum Temperature: The highest temperature of a certain area during a day.

(a) Angle or solid angle

(b) Relative density, etc.

(c) Planck’s constant, universal gravitational constant, etc.

(d) Raynold number

θ = l/r ⇒ l = rθ ⇒ l = 31 x (3.14/6)cm = 16.3 cm

Angle, θ = \(\frac{l}{r}\)radian

From questions, θ = \(\frac{\pi}{6}=\frac{l}{31}\) 

⇒ length, l = 31 × \(\frac{\pi}{6}\) cm

= \(\frac{31\times3.14}{6}\)

= 16.22 cm

≈ 16.2 cm

Here the x, y, z coordinates of the point are 4, -3, 0. 

As the distance of point along the z-axis is 0, the plane in which the point lies is the xy-plane.

∵ All the coordinates of the given point (-2,-3,-4) are negative.

∴ point belongs to seventh quadrant.

Hence, option(B) is the only correct choice.

(i) (1, 2, 3):- 1^st Octant,

(ii) (4, – 2, 3):- 4^th Octant,

(iii) (4, –2, –5):- 8^th Octant,

(iv) (4, 2, –5):- 5^th Octant,

(v) (– 4, 2, 5):- 2^nd Octant,

(vi) (–3, –1, 6):- 3^rd Octant,

(vii) (2, – 4, – 7):- 8^th Octant,

(viii) (– 4, 2, – 5):- 6^th Octant.

The position of a point in a octant is signified by the signs of the x, y, z coordinates. 

Here is a table showing signs of the x, y, z coordinates in all the octants.

According to the table 

(i) (-4, -1, -6) lies in octant VII 

(ii) (2, 3, -4) lies in octant V 

(iii) (-6, 5, -1) lies in octant VI 

(iv) (4, -3, -2) lies in octant VIII 

(v) (-1, -6, 5) lies in octant III 

(vi) (4, 6, 8) lies in octant I

(A) is the correct answer.