Explore topic-wise InterviewSolutions in .

This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.

251.

Question : What will happen if both the characters present in F_(1) generation pass together in F_(2) generation?

Answer»

SOLUTION :If both the characters present in `F_(1)` generation PASS together in `F_(2)` generation, then gametes and offsprings would receive DOUBLE dose of information, that will be abnormal.
Discussion
252.

Question : What will be the overall effect on the ecosystem?

Answer»

SOLUTION :The NATURAL BALANCE of the ECOSYSTEM will be DISTURBED.
Discussion
253.

Question : What will be the genotypic ratio of the cross between Rr and rr?

Answer»

`1 : 2 : 1 `
`3 : 1`
`1 : 1`
`1 : 1: 1`

ANSWER :C
Discussion
254.

Question : What will be the effect on paddy crop if frog population declines all of a sudden?

Answer»

Solution :Paddy crop production will GO down as the POPULATION of GRASSHOPPERS will INCREASE and they will damage the paddy crop.
Discussion
255.

Question : What will be the effect of industry established on river bank on the river ecosystem?

Answer»

Solution :(i) The RIVER water will be affected by the chemicals released as effluents from the industry.
(ii) The animals and plants in the river may die.
(III) The animals and human beings dependent on the river water also are seriously affected by the POLLUTED water and it will make the soil AROUND the polluted water infertile.
Discussion
256.

Question : What will be the DNA content of a cell at G_(1) after S and G_(2) if the content after M phase is 2C.

Answer»

Solution :`G_(1)2C, S_(1)-4C, G_(2)-4C`
Discussion
257.

Question : What will be produced from the fertilised egg cell in a flower ?a.Embryob.Sporec.Fruitd.All of given

Answer»

EMBRYO
Spore
Fruit
All of given

Answer :B
Discussion
258.

Question : What were the important discoveries that led to the stepping stones of recombinant DNA technology?

Answer»

Solution : (a) Presence of plasmid in bacteria that can undergo replication independently along with chromosomal DNA
(b) RESTRICTION ENZYMES cuts or break DNA at specific sites and are also called as molecular SCISSORS
(c) DNA LIGASES are the enzymes which help in ligating (joining) the BROKEN DNA fragments
Discussion
259.

Question : What was used by Mendel for his experiments ?

Answer»

FRUIT flies
Pea plant
RICE plant
RABBITS

Answer :B
Discussion
260.

Question : What was the reason behind 'Hug the Trees Movement' and what happened during it? What was the result of the movement ?

Answer»

Solution :The reason BEHIND .Hug the Trees Movement. was to stop the plan of cutting down the FOREST trees near Reni village by logging CONTRACTORS.
During this movement, when the contractor.s workers appeared in the forest, the women of the village hugged the tree trunks, THUS PREVENTING the workers from felling the trees. The result was that the contractor had to withdraw ultimately and the government of India was forced to give a fresh thought to the proper use of forest produce.
Discussion
261.

Question : What was the common character on which races of human populations were determined.

Answer»

SOLUTION :SKIN COLOUR.
Discussion
262.

Question : what was his contribution for ?

Answer»

Solution :(i) The 1979, the local social FORESTRY DEPARTMENT in Assam began a social aforestation project in 200 hectares of land.
(ii) Even after completion of the project, Molai single handedly continued to plant the trees.
(iii) At PRESENT, the barren area is coverd with trees to about 1360 acres.
(iv) We learn that even if many people come together to DESTROY a forest, a single person if determined can make a DIFFERENCE and create a new forest.
(v) In any environmental projects do not think what can you do? Thik if you do, then others around you will follow you.
Discussion
263.

Question : What type of cells with you observe in an onion peel examined under a microscope ?

Answer»

DEAD cells
Guard cells and STOMATA
Typical plant cells
All of these

ANSWER :C
Discussion
264.

Question : What substance is mixed with food in the mouth during chewing by the teeth ?

Answer»

Pepsin
Saliva
Lipase
All of the Above

Answer :B
Discussion
265.

Question : What substances are contained in the gastric juice? What are their functions?

Answer»

Solution :Gastric JUICE contains three substances: hydrochloric ACID, enzyme pepsin and mucus.
Their FUNCTIONS are: (i) Hydrochloric acid in the stomach is used to make the medium acidic to facilitate the action of the enzyme pepsin and to kill germs if any.
(ii) Enzyme pepsin digests proteins to CONVERT them into peptones.
(iii) The mucus HELPS to protect the stomach wall from its own secretions of hydrochloric acid.
Discussion
266.

Question : What shape is a young dicot embryo ?

Answer»

SOLUTION :GLOBULAR
Discussion
267.

Question : What regulates the exit of food from stomachinto small intestine ?

Answer»

VALVE
SPHINCTER muscle
Villi
All of the above.

ANSWER :B
Discussion
268.

Question : What provides insulation to Nerve Fibres,

Answer»

Myelin
Schwann cells
Prostaglandin
Dendrites

Answer :A
Discussion
269.

Question : What protects the inner lining of stomach from hydrochloric acid?

Answer»

SOLUTION :The inner LINING of stomach is protected from HYDROCHLORIC ACID by MUCUS.
Discussion
270.

Question : What processes would you consider essential for maintaining life?

Answer»

Solution :The important processes essential for maintaining life are: NUTRITION, respiration, TRANSPORTATION and EXCRETION and control and coordination.
Discussion
271.

Question : What processes would you consider essential for maintaining life ?

Answer»

Solution :1. Nutrition 2. RESPIRATION 3. TRANSPORTATION 4. Excretion.
Discussion
272.

Question : What process in plants is known as transpiration?

Answer»

Solution :The RELEASE of water vapours in the ATMOSPHERE through the PORES present on plant LEAVES, i.e., stomata, is called transpiration.
Discussion
273.

Question : What prevents backflow of blood inside the heart during contraction?

Answer»

SOLUTION :VALVES in heart prevent BACKFLOW of blood INSIDE the heart during CONTRACTION.
Discussion
274.

Question : What precautions can be taken for preventing heart diseases ?

Answer»

Solution :Diet MANAGEMENT: Reduction in the intake of calories, low saturated fat and cholesterol rich food, low carbohydrates and common salt are some of the Dietary MODIFICATIONS. Diet rich in polyunsaturated fatty ACIDS is ESSENTIAL. Increase in the intake of fibre diet, fruits and vegetables, protein, minerals and vitamins are needed.
Physical activity: REGULAR exercise, walking and yoga are essential for body weight maintenance.
Avoid Addictive substances: Alcohol consumption, Psychotrophic drugs and smoking are to be avoided.
Discussion
275.

Question : What part of plant transport water ?

Answer»

SOLUTION :XYLEM TISSUE.
Discussion
276.

Question : What part does the diet play in helping us to have a healthy thyroid gland?

Answer»


ANSWER :Diet PROVIDES iodine for making thyroxine HORMONE which keeps the THYROID GLAND healthy
Discussion
277.

Question : What other names were available for gene at the time of Mendel's era ?

Answer»

Solution :Alleles, TRAITS, FACTORS, UNITS and PARTICLES.
Discussion
278.

Question : What organs are attached to the two bronchi?

Answer»

Solution :LUNG, Bronchioles and Alveoli are the ORGANS, ATTACHED to BRONCHI.
Discussion
279.

Question : What name is given to the blood vessels which generally bring blood to an organ ?

Answer»

SOLUTION :AFFERENT BLOOD VESSEL.
Discussion
280.

Question : What methods will you use for growing jasmine and rose plants?

Answer»

Solution :For GROWING jasmine PLANTS, layering method will be used and for growing rose plants, CUTTING and GRAFTING METHODS will be used.
Discussion
281.

Question : What makes red blood corpuscles red?

Answer»

SOLUTION :HAEMOGLOBIN
Discussion
282.

Question : What kind of mirror-concave, convex or plain - would be best suited for use in a solar cooker ? Why ?

Answer»

SOLUTION :USE of concave mirror is best suited for SOLAR cooker because it is a converging mirror that converges large amount of sun RAYS into the solar cooker.
Discussion
283.

Question : What is Yellow Revolution related to,

Answer»

Fertilisers
Tomato
OIL seeds
Prawns

Answer :C
Discussion
284.

Question : What is your conclusion from this diagram ?

Answer»


Answer :Conclusion : The dinosaur COULD not fly and it is POSSIBLE, that the evolution of feathers had nothing to do with flight. But during evolution REPTILES may have given rise to BIRDS.
Discussion
285.

Question :What is water harvesting? How can this technique help in conservation of water?

Answer»

Solution :An age-old concept in INDIA which involves storing RAINWATER in the large structure, for round the YEAR supply is called water HARVESTING.
Its MAIN purpose is to hold surface water and to recharge the ground water beneath.
Discussion
286.

Question : What is vernalisation?

Answer»

growth curve in response to light
recurrence of day and NIGHT
EFFECT of day LENGTH on plant growth
ACCELERATION of the ability to FLOWER by low temperature treatment

Answer :D
Discussion
287.

Question : What is vegetative reproduction? Give and example.

Answer»

Solution :New plantlets, which are formed from the VEGETATIVE (somatic) parts of plants, such as root, stem, leaf or bud from the PARENT body is called vegetative reproduction. EG. In Bryophyllum, small plants GROW at the leaf notches.
Discussion
288.

Question : What is vegetative propagation ? State two advantages and two dis-advantages of this method.

Answer»

Solution :Many plants can give rise to new plants through their vegetative parts as roots, stem and leaves. This is known as vegetative propagation. Following are the advantages (any two):
(i) Plants grown by vegetative propagation are genetically similar to the PARENT plant.
(II) Plants that do not PRODUCE seeds too can be multiplied by this method.
(iii) Plants raised by vegetative propagation can bear flower and fruits earlier than those produced from seeds.
(iv) Such methods also make possible the propagation of plants such as banana, orange, rose and jasmine that have lost the capacity to produce seeds. (v) Thus, desirable features of parent plant can be RETAINED and expressed without any change in future generations. Following are the dis-advantages:
(a) All plants are genetically identical to the parent plant and hence no variation
(b) Because of no variation, they would not show any EVOLUTION if propagated solely by vegetative propagation.
Discussion
289.

Question : What is vegetative propagation? State two advantages and two disadvantages of this method.

Answer»

Solution :Vegetative propagation is a mode of asexual reproduction in which new plants are obtained from vegetative parts like stem, ROOT, leaf etc of the parent plant.
Two advantage 5 of vegetative propagation are:
i] It Is suitable for reproduction in plants which do not produce seeds. For example, POTATO, ROSE etc.
ii] This method of propagation is easier, rapid and more economical than the reproduction of plants from their seeds.
Two disadvantages of vegetative propagation are:
i) As there is no genetic variation, no new varieties can beproduced with better or improved traits.
ii] Plants produced by this method are more susceptible todiseases as the entire plant may GET affected as there is no genetic variation.
Discussion
290.

Question : What is vegetative propagation ? State the advantages of it.

Answer»

Solution :In MANY plants root, stem and leaves develop into condition. Such a mode of reproduction is called new plants under appropriate vegetative propagation.
ADVANTAGES of vegetative propagation are as follow :
(1) Vegetative propagation is used in layering or grafting methods to grow many plants LIKE sugarcane, grapes for agricultural roses purposes.
(2) Plants raised by vegetative propagation can bear flowers and fruits earlier than those produced from seeds.
(3) The plants that have lost the capacity to produce seeds can ALSO be produced by vegetative propagation. e.g., banana, orange, rose, jasmine
( 4 ) All plants produced by vegetative propagation are genetically similar to the parent plant.
Discussion
291.

Question : What is vegetative propagation ? List with brief explanation two advantages of practising this process for growing same types of plants. Select two plants from the following which are grown by this process : Banana, Wheat, Mustard, Jasmine, Gram.

Answer»

Solution :(a) Vegetative propagation is the development of a new PLANT from the vegetative parts / roots, stem and LEAVES of a plant.
(b) Advantages : (i) Such plants can bear flowers and FRUITS earlier than those produced from seeds
(li) Allows propagation of plants (BANANA, orange etc) that have LOST capacity to produce seeds.
(iii) Jasmine, banana.
Discussion
292.

Question : What is vegetative propagation ? How is it useful ?

Answer»

SOLUTION :Vegetative Propagation. Vegetative propagation is defined as formation of two or more individuals from any vegetative part of plant. In this type of vegetative propagation new plants can be RAISED from ROOTS or stems or leaves of a plant. It is a very RAPID method. It is of two types.
A. Natural vegetative propagation
B. Artificial vegetative propagation.
Vegetative propagation is useful for reproduction of plants.
Discussion
293.

Question : What is vasa recta ?

Answer»

Solution :Capillary network running parallel to LOOP of Henle is KNOWN as VASA recta.
Discussion
294.

Question : What is urethra?

Answer»

Solution :The urine COLLECTED into the urinary bladder passes through a muscular tube which is CALLED URETHRA.
Discussion
295.

Question : What is Tyndall effect ? What is its cause? Explain two pheno menon observed in daily life which are based on Tyndall effect.

Answer»

Solution :Tyndal cffect: When a beam of light is passed through a colloidal solution placed in a dark room the path of beam becomes illuminated when observed through a MICROSCOPE placed perpcndicular to the path of light. This effect is called TYNDALL effect.
Causes of tyndal effeet: The size of the callidal partical is relatively larger then the solute particals ofa true solution. The collidal particles first absorb energy from the incident light and then a part of energy from their surface. Thus tyndall effect is due to scattering of light by the colloidal particals and the colloidal particles are seen to be moving as POINTS of lights moving aginist a dark background.
Daily life examples :
(i) When SUNLIGHT passcs though a canopy of a dense forest the tiny water droplets in the mist scatter light and become visible.
(ii) When a fine beam of sunlight entersa smoke filled room through a SMALL hole the smoke particals become visible due to the scattcring of light.
Discussion
296.

Question : Whatistrueof gametes ?

Answer»

They are diploid
They GIVE RISE to GONADS
They PRODUCE hormones
They are FORMED from gonads

Solution :They are formed from gonads
Discussion
297.

Question : What is transpiration?

Answer»

SOLUTION :Transpiration is the evaporation of water in plants through stomata in the LEAVES.
IMPORTANCE of Transpiration
(a) Creates transpirational pull for the transport of water.
(b) Supplies water for photosynthesis.
(c) Transports minerals from soil to all parts of the PLANT.
(d) Cools the surface of the leaves by evaporation.
(e) KEEPS the cells turgid, hence, maintains their shape.
Discussion
298.

Question : What is transpiration pull?

Answer»

Solution :Water in the mesophyll cells of leaves (cells LOCATED below the stomata) is in contact with water or sap in xylem of leaf petiole, stem and root. This water evaporates by the process of transpiration. Thus, due to transpiration water is PULLED UPWARD which CREATES an upward SUCTION force called ‘transpiration puli’.
Discussion
299.

Question : What is transpiration ?

Answer»

Solution :LOSS of water in vapour from AERIAL parts of plant is CALLED transpiration.
Discussion
300.

Question : What is tissue chlture ?

Answer»

Solution :(1) The traditional methods for the artificial propagation of plants are being REPLACED by the modern methords of artificial propagation of plants involving tissue CULTURE, as it motre beneficial than the traditional methods.
(2) In tissue culture , they just put a few plant cells or plant tissue in a growth medium with plant horomones in it and it GROWS into newplants.
(3) Thousand of plants can be grown in very short INTERVAL of time .
(4) There will be no climatic impact on the propagation, so multiplication can be DONE throughout the year.
(5) It is possible to obtain plant the are free from pathogens.
Discussion