Explore topic-wise InterviewSolutions in Current Affairs.

Kill with sticks.

Parrot (Rose ringed parakeet)

Correct option is (c) 300

Correct option is (a) 4-5

Owl and eagle.

Correct answer is 16 traps

Correct option is (d) All

At 40 locations at the rate of 10 grams of bait at a point.

Precautions while-using poisonous baits:

• Use a stick or Khurpa for mixing the ingredients of bait while preparing. Otherwise use rubber gloves. Protect eyes, nose and mouth from the bait;
• Keep rodenticides and poisonous bait away from the reach of children and domestic animals.
• Never prepare baits in household utensils.
• Use polythene bags for carrying baits and after use bury these bags under the earth.
• Killed rats along with baits should be buried deep under the earth.
• Zinc phosphide is very poisonous for humans. In case of accidental ingestion induce vomitting by inserting fingers in the mouth upto throat and rash to doctor.

• Poison bait should be kept away from the reach of children, domestic animals, pets and birds.
• Save the mouth, eyes and skin from the poison b&t.
• Never use household utensils for the preparation of poison bait.
• Use polythene bags for storage and carrying these poison baits. Bury them after use.
• Collect and burry the left over poison bait and the dead rats always from the field.

Correct answer is 2.5 acre

1. Making explosions: 

Make false gun shots at different time intervals to scare the birds.

2. Using scarecrow:

Take a small pitcher, draw human face on it using colour. This pitcher is made to hang on the sticks fixed vertically in the fields. Put on human clothes on this structure. This is known as scarecrow. Birds consider this structure as human being and do not come to the field.

3. Hanging dead crows:

Parrot has little communal association with crows. Therefore, to keep the parrots away from the fields, hang 1-2 dead crows/their dumies at sites of frequent bird damage. This way we protect oilseed crops from parrots.

4. Using rope-crackers:

Tie fire crackers on a rope at 6-8 inch distance. Ignite the lower end of the rope. Explosions caused by fire crackers at different intervals scare the birds and the birds fly away. Fix the rope in the center at the time of germination and at the boundaries of the field at the time of maturity.

Using only one method to control rats is not very effective. Rats multiply themselves quickly by giving birth to off springs. Therefore, use more than one method to kill rats. Rats coming out from flooded burrows should be killed using sticks. After sowing of a crop use chemical methods to kill rats. After pre-baiting also put some gas tablets in the burrows. After zinc phosphide if needed use bromadiolone.

Natural selection means that nature selects the best trait in a species, leading to survival of fittest and evolution oI species.

The mouse will continue to have information for presence of tail in its DNA. So, it will continue to have tail because absence of tail is an acquired trait.

According to Vandana Shiva, monocultures have replaced biodiversity.

(i) Characters are controlled by genes.
(ii) Each gene controls one character.
(iii) There may be two or more forms of gene.
(iv) One form may be dominant over the other.
(v) Genes are present on chromosomes.
(vi) An individual has two forms of gene whether similar or dissimilar.
(vii) The two forms separate at the time of gamete formation.
(viii) The two forms are brought togerher in the zygote.

According to Lamarck's theory of use and disuse, giraffes had to stretch their necks and forelimbs for feeding on leaves of tall trees because of which these organs were elongated. But this theory has been completely discarded. It is now proposed that, the giraffe's neck evolved with time because of 'necking'battle with time and natural selection, only giraffes with long necks survived.

Bacteria have simpler body plan when compared with human beings. Both of them have  evolved differently. Bacteria can inhabit most of the unfavourable habitats such as hot springs,  deep- sea thermal vents and the ice in Antarctica.

Correct answer is (b) shield, scutellum

Geographical isolation is the major factor in the speciation of sexually reproducing animals  because it interrupts the flow of genes between their isolated populations through the  gametes.

Yes, geographical isolation gradually leads to genetic drift. This may impose limitations to sexual reproduction of the separated population. Slowly the separated individuals will reproduce among; themselves and generate new variations. Continuous accumulation of those new variations through a few generations may ultimately lead to the formation of a new species.

Correct answer is (d) Mosaic

Correct answer is (a) special proteins

Since the middle of 20th century, the operation and use of air transport has increased rapidly, that’s why modern age is called the Air Age.

The most speedy mode of transport is air transportation.

Name of two major waterways in Europe are: 

1. Rhine waterway. 

2. Danube waterway.

A transport network or transportation network is a realization of a special network describing a structure which permits either vehicular movement or flow of some commodity.

Aim: 

To observe the conduction of water by a stem. 

What you need: 

A small twig of balsam plant, a glass of water, red ink. What to do:

• Take a glass of water and add a few drops of ink to it. 
• Now place the small twig in the water.

What do you see: 

The stem turns reddish. What do you learn: The red ink is taken and transported by the stem upwards.

Water transportation is the cheapest to carry heavy goods through long distances between the continents.

Land transportation can be divided into two parts – roadways and railways.

The animals which feed on only plants and plant products is called herbivores.

For small distance roadways are more beneficial than railways.

(b) Transportation

(b) Trans Canadian highway

Correct Answer is: (b) USA

Road density is the ratio of the length of total road network of country to the land area of country. The road network includes all roads in the country. Motorways, highways, main or national roads, secondary or regional roads and other urban and rural roads. Normally the network of roads found in per 100 sq. km areas are called road density.

North American continent.

Fission: It is the method of asexual reproduction in the unicellular form of life.

ln this piocess the parent organism splits to form two or more daughter cells.

Example: Amoeba/Plasmodium/Paramecium.

Fragmentation: It is.the process found in multicellular organisms. The filament breaks up into two or more pieces upon maturation. These  Rtecea then grow into new individuals

Example: Spirogyra.

Detailed Answer:

Fission: It is defined as the splitting of a unicellular organism into two or more than two separate daughter ceils. It is the most common and simplest method of asexual reproduction in unicellular organisms, such as bacteria and Protozoa. Generally, it is of two types i.e. binary and multiple fission. In binary fission, parent organism divides into two identical daughter organism with definite orientation. In multiple fission, parent organism divides into binary identical daughter organisms. The nucleus of the cell splits repeatedly to form many smaller nuclei called daughter nuclei surrounded by a little bit of cytoplasm and thin membrane around them.

Fragmentation:  It is a form of asexual reproduction in which multicellular organisms like filamentous algae (Spirogyra) break up into two or more small fragments or pieces. On maturity, each of which subsequently grows to form a completely new organism.

Bud, at its notches, develop into new plants.

Detailed Answer:

When Bryophyilutn leaf falls on the wet soil, the buds that are produced in the notches along the leaf will develop into new plants by the process known as vegetative propagation.

North-East Trade Winds and South Westerlies bring rainfall in North America. The North-East Trade Winds bring heavy rainfall to the east coast and southern parts of North America during summer. The South Westerlies, coming from the Pacific Ocean, bring rain throughout the year to places in the north-west of North America and winter rain to places in south-west North America.

Natural gas is a mixture of hydrocarbons such as methane, ethane, and propane. It is usually found together with petroleum in the same region. It is an important fuel and is used for lighting, heating and generating electricity for industrial and domestic use. Nowadays natural gas is transported by pipelines and in special tankers or barges as liquefied natural gas.

When a Planaria gets cut into two pieces, each piece regenerates into a new Planaria.

The prairies are the natural vegetation of the interior parts of North America in the cool temperate latitudes. Very little summer rainfall can support only the rich, tall grasses, which occur in vast stretches. Cattle rearing is, therefore, the main occupation here. But at several places, the grass has been replaced by wheat farms, another major occupation of the region.

North America also has vast water power resources. Large dams have been constructed across rivers such as the Columbia, the Tennessee and the Colorado to produce hydroelectric power. Many power projects have also been developed in the Appalachian and the Rocky Mountains. The Niagara Falls provide water power to both Canada and the USA.

North America lies within the temperate zone. Some parts in the north of the continent lie in the frigid zone. So the northern part of the continent is colder than the southern part.

The west coast of North America, especially the Californian Coast, experiences hot dry summers and cool wet winters. So, the natural vegetation of this region is adapted to withstand the drought conditions. The cork oak, olive, Mediterranean pine, laurel, and cedar are the trees found in this region. Fruit trees such as orange, peach, apricot, lemon, and walnut thrive. Fruit orchards have replaced much of the original scrub-like vegetation called chaparral.

In North America, both the Western Cordilleras and the Eastern Highlands extend in a north-south direction parallel to the coast. Thus, in winter, the cold winds from the tundra region can easily reach the interior of the continent as there is no east-west range to block it. Likewise, in summer, the warm winds from the torrid zone raise the temperature of places situated in the temperate latitudes. The direction of the mountain ranges also cuts off the interior central plains from the maritime influence of the Pacific and Atlantic Oceans.