Explore topic-wise InterviewSolutions in Current Affairs.

1. True

2. True

3. False

4. True

5. True

• By planting more and more trees.
• By adopting developed means of agriculture.
• By decreasing the grazing area of cattle.

A highly dissected land surface is known as bad larid. In sloping areas, gully erosion results in soil erosion. These gullies develop a ravine land a bad land topography. This topography consists of ridges, earth pillars, ravines, escarpments, etc. This topography is found in Chambal Valley of Madhya Pradesh in India.

Below the earth’s crust is Mantle. Its normal thickness is 2900 kms deep down to earth’s interior.

Igneous rocks, Sedimentary rocks, Metamorphic rocks.

Metamorphic Rocks: These rocks are formed by ‘metamorphism’ or change of form of igneous and sedimentary rocks. The change takes place in hardness, colour, texture and composition of minerals in rocks deep inside the earth due to pressure and temperature. Thus original igneous rock like mica may be changed to schist, granite to gneiss and sedimentary rocks like limestone to marble, sandstone to quartzite and peat to coal.

Characteristics:

• They are very hard.
• They contain useful materials and minerals like building materials, marbles, gems, rubies and sapphires. Taj Mahal is made of white marble.

Forests are considered as the place of penance in Indian culture, moreover, they are excellent places for meditation and gaining knowledge. So, they have an important place in Indian culture.

The direct benefits derived from forests are attainment of fuel wood, fodder for animals and different types of herbs and medicines.

Deforestation takes place in India for obtaining agricultural land, residential land and wood.

The forests on which an individual person or firm has full right and control are called Individual Forests.

Correct Answer is: (c) Michelia

Correct Answer is: (c) Tidal forest

In India, the Sundari Forests are found in the deltas of Ganga and Brahmaputra rivers.

The forests where there is no prohibition on wood-cutting and grazing of animals are called Unclassified Forests.

The average of annual rainfall should be more than 200 cm and the annual average temperature should be 24°C. These are the geographical conditions necessary for evergreen forests.

The vegetation that is found in evergreen forests includes rubber, mahogany, iron – wood, ebony, wild mango, palm, vines etc.

The Sundari trees are found in the tidal forests in India. Due to primacy of these trees, the tidal forests are also known as Sundari Forests in India.

The characteristics of dry forests are: 

1. These forests are found in the regions where there is 50 – 100 cm of annual rainfall.

2. The roots of these trees are long. 

3. Due to lack of rainfall, the height of trees in this forest usually is found to be from 6 to 9 meters. 

4. These forests have local importance.

Correct Answer is: (d) Ebony

Dry Forests are found in the regions where there is an average annual rainfall is between 50 cm to 100 cm. These types of forests are found mainly in south – western Punjab, Haryana, eastern Rajasthan and south – western Uttar Pradesh in India.

Hawthorn, Ram bans, Khejara, Khair and date tree type thorny vegetation is found in desert forests.

Jet stream is a narrow variable band of high level air circulation currents encircling the globe several miles above the earth.

Correct Answer is: (A) Trapa 

Water lilies, sedges, crow foots are other important water plants. Trapa is one of the hydrophytic plant (hydrophytic plant meaning - plants which live in water and adjust their surrounding).

True

Calcium oxide (CaO) is also called quicklime. Quick lime is formed when calcium carbonate (limestone) is heated. This is also an example of decomposition reaction. 

Hence, the give statement is true.

(a) Abscisic acid is the hormone in the plants that stop the growth during extremely dry season.

(b) Cytokinins are present in greater concentration in fruits and seeds.

Physical theories of Ascent of Sap.

• Atmospheric pressure theory
• Imbibitional theory
• Capillarity
• Root pressure theory. 

When quicklime is added to water, it forms slaked lime along with evolution of heat. There will be a rise in temperature of the bucket.

Correct Answer is: (A) In vitro 

• In Vitro Fertilization (IVF) for pregnancy to occur, an egg must be fertilized by a sperm. When fertilization happens inside the body, it is called in vivo fertilization. 

• When fertilization happens outside of the body, it is called in vitro fertilization, or IVF. 

Component of force along horizontal,

F_x = F cos 60°

= 72 x \(\frac{1}{2}\) = 36 dyne

Using, F_x = ma_x

we get, a_x = \(\frac{F_x}{m} = \frac{36}{9}\)

= 4 cms^-2

The chromosomes which are associated with sex determination are called sex chromosomes.

(d) is the same at all points.

(i) Fossils : The remains/impression of dead / decayed plants / animals.

(ii) Formation of fossils: Formed when dead organisms are compressed under high pressure deep under the soil.

(iii) Determination of age of fossil-Two methods :

(i) Relative method, 

(ii) Carbon dating method

(iv) The presence of fossilized remains of the organisms is the evidence of the existence of the organisms millions of years ago, out of which some have become extinct.

(v) Fossil also helps in the determination of the connecting links between various groups and their origin from the primitive ones.

The segment of DNA which is functional and is made of nucleic acids and protein is called gene.

(c) velocity
(d) momentum.

Human females have two X chromosomes called sex chromosomes. During meiosis at the time of gamete formation, one X chromosome enters each gamete. Hence all the gametes possess an X chromosome.

Following are the causes of variations:
(i) Dual percentage: Offsprings inherit some features from mother and some from father, hence no offspring will exactly resemble to either of the parent or each other.
(ii) Mutation in gene or chromosomal pattern also causes variations.

Mendel observed the occurrence of contrasting characters of garden pea in various generations. On this basis, he interpreted that these contrasting characters are controlled by factors. He considered each and every character as a unit, which is controlled by a 'factor'. Factors are carriers of hereditary information. Now factors are known as genes.

Shih Hu WangTi.

STANDARD POTENTIAL (normal potential), the value of the electrode potential measured under standard conditions relative to the selected reference electrode (standard electrode). The electronic potential in a number of metals will decrease.

STANDARD POTENTIAL (normal potential), the value of the electrode potential measured under standard conditions relative to the selected reference electrode (standard electrode). The electronic potential in a number of metals will decrease.

Kraus-Weber Test for muscular strength: 

Test 1: Straight legs sit-ups 

Purpose: To measure strength of the abdominal and psoas muscles.

Procedure: Lie down in supine position, fingers interlocked behind neck, legs straight. The partner holds the feet of the subject. After command subject comes up to sitting position. 

Scoring: If without help, subject reaches to sitting position, 10 marks are awarded and if the subject is not able to lift shoulders zero marks are awarded. 

Test 2: Bent knee sit-ups 

Purpose: To measure strength of the abdominal muscles. 

Procedure: From supine position, the subject will keep the knees bent, fingers interlocked behind the neck. Roll up to sitting position, partner is holding the feet. 

Scoring: 

(a) It not able to lift shoulders, zero marks. 

(b) If reaches sitting position, 10 marks. 

(c) If there is distance from sitting position, it is marked between 0-10 marks. 

Test 3: Leg raise (Supine position) 

Purpose: To measure strength of the psoas and lower back. 

Procedure: Lie down in supine position on table, hands behinds the neck. Now lift the legs to 10 inches above the table and hold for 10 seconds. 

Scoring: Holding legs for 10 seconds scores 10 points. If held for 5 seconds then 5 points and so on. 

Test 4: Leg raise (Proline position) 

Purpose:To measure strength of upper back. 

Procedure: Lie on prone position on table, hands to be kept under chin. A pillow is kept under abdomen. The partner presses the back and trunk of the subject. The subject is advised to lift legs to 10 inches above the table and hold for 10 seconds. 

Scoring: Holding the legs for 10 seconds scores 10 points, if held for 5 seconds then 5 points and so on. 

Test 5: Lifting upper body (prone position) 

Purpose: To measure strength of lower back. 

Procedure: Lie on proline position, hands behind the neck and a pillow is kept under abdomen. The partner presses the legs and hip of subject. Now lift upper body to 10 inches above the table and hold for 10 seconds. 

Scoring: Holding the upper body for 10 seconds scores 10 points. Anything less than 10 seconds is scored accordingly. 

Test 6: Toe touch from standing position 

Purpose: To measure the strength of back and hamstring. Procedure: Stand erect with bare feet. Now slowly touch the hands to feet and stay there for 3 seconds. 

Scoring: Full 10 marks are given for complete touch (3 seconds). If subject is unable to touch by 2 inches B marks are awarded. The more the distance, the less the marks.

 A few crystals of KNO₃ are heated in a hard glass test tube Oxygen gas.

 Nitrogen dioxide gas.