Explore topic-wise InterviewSolutions in Current Affairs.

The tiny pores present on the surface of the leaves are called stomata.

Causes for road accidents in rural areas :

1 Leaving animals like buffaloes, goats, sheeps etc., on roads.

2. Using tractors with cage wheels. 

3. Heavy vehicles like proclainer cause potholes on roads. 

4. Piling up of grass, dumping of garbage on road sides and corners. 

5. Traffic caused by village fairs and markets. 

6. Drying piles of grains in the roads.

Correct option is B) nitrogen

• The web of the spiders is made up of a special protein that solidifies to form silken threads. 
• The spider spins a web to trap insects. 
• When an insect accidentally flies over the web it gets stuck in the web. 
• The vibrations in the web are received by the spider and it attacks on the insect. 
• The spider releases some poisonous materials into the body of an insect to paralyzes it and makes the prey into liquid form. 
• This liquid form of food is absorbed by the spider. 
• This is how a spider shares its habitat.

• The microscope is an instrument with the help of which we are able to see minute things that we cannot see with our eyes. 
• It works like a hand or magnifying lens but it is much more powerful. 
• Basically, there are two components in a microscope the structural component and a visual component. 
• The structural component are the head/body base and arm. 
• Visual components are eyepiece, objective, nose piece coarse and fine adjustment knobs, stage, aperture etc.

Correct option is A) Exchange of air
 

A) light is essential for photosynthesis

Correct option is A) Air
 

Correct option is A) Convex

Stomata help in exchange of gases.

Correct option is C) photosynthesis

• The animals take food whenever they get it. 
• If they are disturbed during their eating, they get annoyed and may behave with perversion. 
• Rajesh does not like to interfere with the nature as its adverse effects reflects on our quality of life.

• We should take care of our pet animals. Ex : Dog, Parrots, Cow, etc.
• Keeping their sheds clean, supplying fodder and water to them is our responsibility. 
• If we show concern for animals they become affectionate to us. 
• You notice your pet dog licks your feet, wags its tail, sits near you and walks with you.

Correct option is C) symbiosis

(i) Cuscuta

(ii) Pitcher plant, Venus Flytrp (Insectivorus Plants)

(iii) Stomata

• We find animals living on trees, in our houses, in different areas in the pond, in a small pool of water after rains and in several other places. 
• As the area increases, the type and number of organisms living there usually increase. 
• You would find more type of organisms living in your house than your hair, and more in the pond than your house, more in the lake than your pond and so on. 
• These larger areas are suitable for supporting the life of more organisms.

Correct option is B) Starch

Correct option is A) Reproduction

1. Prathima is correct. ‘Mushroom is a plant’. 

2. Mushrooms grow on rotting wood during the rainy season. 

3. Mushrooms are not like green plants as they lack chlorophyll 

4. They can not make food by photosynthesis. They are saprotrophs.

Correct option is D) All of these

Correct option is D) Von Helmont

1. Farmers sprinkle urea in rice or wheat fields whenever the leaves turn yellow. 

2. The leaves soon become green again. 

3. After sprinkling urea, farmers irrigate their fields. 

4. Urea dissolves in water and stay near the roots of the rice plants. 

5. The plants absorb this urea dissolved in water through their roots. 

6. This is the reason why farmers irrigate the fields after sprinkling urea. 

7. The rice or wheat plants get water and other nutrients dissolved in it thus.

The all the above-mentioned atomic numbers belong to 2nd and 3rd groups which have a difference of 8 between them so the numbers which have a difference of 8 is ‘9’ and ‘17’. So, the correct option is (c).

The elements B(Lithium), C(Nitrogen), D(Neon) all lie in the same 2nd period.

Parasitic plants develop special roots called haustoria, which penetrate into the tissues of the host plant and absorb food materials from them.

Mendeleev classified the elements on the basis of their fundamental property, i.e. atomic mass and chemical properties. He reacted the elements with hydrogen and oxygen and formulae of the hydrides and oxides of the elements were considered as a basic property for their classification.

Alkali metals are Li, Na, K.

Plants which obtain the food from dead and decaying bodies of other organisms are called saprophytic plants e.g. Yeast and mushrooms.

• Herbivores: goat, cow, buffalo. 
• Carnivores: tiger, lion 
• Omnivores: monkey, human, chimpanzee 
• Scavengers: vulture, crow, hyena 
• Decomposers: microbes

Explain the terms:

1. Herbivores: Animals that depend on plants only for their food are called Herbivores. 

2. Carnivores: Animals that depend on other animals for their food are called Carnivores. 

3. Granivores: Animals that eat grains (seed) are called Granivores. 

4. Frugivores: Animals that eat fruits are called frugivores. 

5. Omnivores: Animals that obtain their food from both plants and animals are called omnivores. 

6. Scavengers: Animals that obtain their food from dead bodies of animals are called Scavengers. 

7. Decomposers: Microbes which obtain their food by decomposing the dead bodies of organisms or other materials are called decomposers. 

8. Ectoparasitic nutrition: Some animals live on the body surface of other animals and obtain their food by sucking their blood. This is called ectoparasitic nutrition. 

9. Endoparasitic nutrition: Some animals live inside the body of other animals and obtain their food. This is called endoparasitic nutrition. 

10. Symbiotic nutrition: In some cases, two or more than two different types of plants live together to fulfill their needs of nutrition, protection, support etc. with each other’s help. This type of nutrition is called symbiotic nutrition.

K    L ∴ Atomic Number = 4 

2, 2 Element = Beryllium

The given table consists of group no. 8, 9 and 10 respectively. So the element p=Iron, q=Cobalt, r=Nickel and s=palladium.

The element with atomic number 17 is chlorine. It belongs to 17^th group. The element belonging to 5^th period of the same group is iodine which has an atomic number of 53.

Cuscuta is a nongreen yellow thread-like plant completely dependent on the host plant, loranthus is a partial parasitic because it can prepare its own food and it only takes water and minerals from the host plant.

There are two types of nutrition.

1. Some organisms can produce their own food and thus nourish themselves. This is called autotrophic nutrition.

2. Some organisms depend on other organisms, plants and animals for their food. This is called heterotrophic nutrition.

Steps of nutrition in animals are as follows:

1. Ingestion: Food is taken into the body. 

2. Digestion: Conversion of food into simple soluble forms. 

3. Absorption: Transfer of soluble food to the blood. 

4. Assimilation: Utilization of absorbed food by cells and tissues for energy production, growth and repair. 

5. Egestion: Removal of waste products and undigested food from body.

The element is Aluminium. 

The valency = 3

Living organisms need nutrition due to the following: (a) To supply the energy required for doing work, (b) For growth and development of the body, (c) To replace the damaged cells and repair tissues, (d) To fight diseases.

i. Roots of leguminous plants having root nodules.

ii. These types of plants help to provide nitrogen to the soil.

iii. Biological Nitrogen fixation

iv. Root nodules of leguminous plants contain Rhizobium micro-organisms. These microorganisms convert atmospheric nitrogen into nitrates. Thus the soil becomes rich in nitrogen.

i. False, 

Bed bug is an example of ectoparasitic nutrition

ii. True

iii. False. 

The anteater is found in Central and South America

iv. True

v. False. 

Yeast is used in making bread

i. False, 

They obtain their food by decomposing the dead bodies of organisms or other materials

ii. False, 

Oxygen is given out during the process of photosynthesis

iii. True

iv. False, 

Protein are made up of carbon, hydrogen, Oxygen and nitrogen.

They obtain water and minerals from the xylem and phloem of the other host plant.

Loranthus is known as partially parasitic plant because it does photosynthesis with the help of leaves but only for water and minerals it depends on other plants.

i. True

ii. True

iii. False. 

Micro-organism Azotobacter is found in soil.

iv. True

v. True

i. Johannes Burman

ii. saprophytes

iii. Egestion

iv. pseudopodia

v. proboscis

Mass of car, m = 10 kg 

Momentum = mv 

a) Velocity, v = 5 m/s 

Momentum = mv = 50 kg.m/s 

b) Velocity, v = 20 cm/s = 0.2 m/s 

Momentum = mv = 2 kg.m/s 

c) Velocity, v = 36 km/h = 10 m/s 

Momentum = mv = 100 kg.m/s

Tapeworm lives inside the body of other animals and obtain its food. So tapeworm is an endoparasite.

i. Stomata

ii. Carbondioxide, oxygen

iii. xylem

iv. phloem

v. Carbohydrates