4951 + Interview Questions in Biology in Class 10 Page 64 InterviewSolution

3151.	Question :Human genome contains about
Answer» 10,000 nucleotides 10,000 GENES 6 BILLION nucleotides 6 billion genes Answer :C

Discussion

3152.	Question : Himagiri developed by hybridisation and selection for disease resistance against rut pathogens is a variety of ____
Answer» chili maize sugarcane WHEAT Solution :wheat

Discussion

3153.	Question : Human body is made up of five important components, of which water is the main component. Food as well as potable water are essential for every human being. The food is obtained from plants through agriculture. Pesticides are being used extensively for a high yield in the fields. These pesticides are absorbed by the plants from the soil along with water and minerals and from the water bodies these pesticides are taken up by the aquatic animals and plants. As these chemicals are not biodegradable, they get accumulated progressively at each trophic level. The maximum concentration of these chemicals gets accumulated in our bodies and greatly affects the health of our mind and body. With regard to various food chains operating in an ecosystem, man is a
Answer» CONSUMER PRODUCER Producer and consumer Producer and DECOMPOSER. SOLUTION :consumer

Discussion

3154.	Question : Human body is made up of five important components, of which water is the main component. Food as well as potable water are essential for every human being. The food is obtained from plants through agriculture. Pesticides are being used extensively for a high yield in the fields. These pesticides are absorbed by the plants from the soil along with water and minerals and from the water bodies these pesticides are taken up by the aquatic animals and plants. As these chemicals are not biodegradable, they get accumulated progressively at each trophic level. The maximum concentration of these chemicals gets accumulated in our bodies and greatly affects the health of our mind and body. Give one method which could be applied to reduce our intake of pesticides through food to some extent.
Answer» Solution :If we practise ORGANIC FARMING , which does not involve use of chemicals then our intake of PESTICIDES through FOOD will REDUCE .

Discussion

3155.	Question : Human body is made up of five important components, of which water is the main component. Food as well as potable water are essential for every human being. The food is obtained from plants through agriculture. Pesticides are being used extensively for a high yield in the fields. These pesticides are absorbed by the plants from the soil along with water and minerals and from the water bodies these pesticides are taken up by the aquatic animals and plants. As these chemicals are not biodegradable, they get accumulated progressively at each trophic level. The maximum concentration of these chemicals gets accumulated in our bodies and greatly affects the health of our mind and body. Various steps in a food chain represent :
Answer» FOOD WEB Trophic LEVEL Ecosystem Biomagnification Solution :Trophic level

Discussion

3156.	Question : Human body is made up to trillons of cells. Why is it necessary for every cell to have the entir set of chromosomes pairs?
Answer» Solution :The necessary information for the growth and development of all the cells is present in the CHROMOSOMAL genes. The development of an organism - from a FERTILIZED egg, through embryonic and JUVENILE stages, to adulthood - requires the coordinated expression of sets of genes at the proper times and in the proper places. Hence, it is necessary for every cell to have the entire SET of chromosomes (23 pairs).

Discussion

3157.	Question : Human body is made up of five important components, of which water is the main component. Food as well as potable water are essential for every human being. The food is obtained from plants through agriculture. Pesticides are being used extensively for a high yield in the fields. These pesticides are absorbed by the plants from the soil along with water and minerals and from the water bodies these pesticides are taken up by the aquatic animals and plants. As these chemicals are not biodegradable, they get accumulated progressively at each trophic level. The maximum concentration of these chemicals gets accumulated in our bodies and greatly affects the health of our mind and body. Why is the maximum concentration of pesticides found in human beings?
Answer» Solution :The PHENOMENON of progressive increase in concentration of certain harmful non-biodegradable chemicals such as DDT at different levels of food chain is CALLED biological magnification or BIOMAGNIFICATION. The concentration of harmful chemicals will be different trophic levels . It will be lowest in the first trophic level and HIGHEST in the last trophic level of the food chain .

Discussion

3158.	Question : How you can say that some animals rely entirely on environmental cues for sex determination ?
Answer» Solution :In a few reptiles, the TEMPERATURE at which fertilised EGGS are kept determines whether the animals developing in eggs will be male or female. By this we can SAY that some animals RELY entirely on environmental cues for sex determination.

Discussion

3159.	Question : How would you dispose the waste ? Plastic materials.
Answer» Solution :PLASTIC materials like plastic BAGS and buckets ETC., can be RECYCLED and reused.

Discussion

3160.	Question : How would you dispose the waste ? Industrial wastes like metallic cans.
Answer» SOLUTION :INDUSTRIAL waste LIKE metallic CANS can be disposed by melting and RECYCLING into solid metal Wind again.

Discussion

3161.	Question : How would you dispose the waste ? Domestic wastes like vegetable peels.
Answer» Solution :Domestic wastes like vegetable peels can be disposed by COMPOSTING. To CARRY out composting, we dig a pit and bury the domestic waste into it. It should be covered by about ONE FOOT layer of soil

Discussion

3162.	Question : How would you dispose the following wastes? a. Domestic wastes like vegetable peels b. Industrial wastes like metallic cans Can the disposal protect the environment? How?
Answer» SOLUTION : (a) DOMESTIC wastes have to be THROWN out with TRASH. (b)Do vermiform composting system for vegetable wastes which can be used as a MANURE. Industrial wastes like metallic cans can be recycled.

Discussion

3163.	Question : How would our lives change if we could no longer get electricity supply ?
Answer» Solution :The availability of electrical energy to each individual in a country is one of the parameters to measure the growth of the country. Our lives are so DEPENDENT on electricity that it is very DIFFICULT to LIVE without it. `rarr` Household appliances such as fan, A.C., fridge, oven, lamp, radio, TV, etc. run with electric power. Without mobile charging one become handicap in present era. `rarr` Computer and internet SERVICE stops without electricity. So, almost all industries and public WORKING sectors severly affected. `rarr` Our lives will go back to ancient era and our workload will increase.

Discussion

3164.	Question : How would these advantages differ from the advantages of using a long-term perspective in managing our resources ?
Answer» Solution :Using a long-term PERSPECTIVE is to reap the profit in a sustainable manner so that the natural resources will last for generations to come and will not merely be EXPLOITED to HIT short-term gains. All the SECTIONS of society should be made aware about conservation and PROTECTION of the environment.

Discussion

3165.	Question : How will you prevent soil erosion?
Answer» Solution :The following are the methods to prevent soil erosion: RETAIN vegetation cover, so that soil is not exposed. • Cattle grazing should be controlled. • Crop rotation and soil management IMPROVE soil organic matter. • Runoff WATER should be stored in the catchment. • Reforestation, terracing and CONTOUR ploughing. • Wind speed can be controlled by planting trees in form of a shelter BELT.

Discussion

3166.	Question : How will you stain a microscopic slide showing mitosis in onion roots ?
Answer» SOLUTION :Place the cut TIP on a CLEAN microscopic slide . ADD 2-3 drops of acetocarmine stain to the slide . OBSERVE it under a compound microscope.

Discussion

3167.	Question : How will you justify that overcoming the pollution is a powerful way of environmental management?
Answer» Solution :(i) Natural environment consists of air, atmosphere, waater, land, living, organisms, etc. (ii) Continuous interactions occur between biotic and abiotic factors. Their interactions are very important. (iii) Environmental balance is MAINTAINED through continuous operation of various natural CYCLES like biogeochemical cycles. (iv) When some natural factors ofenvironment and some artificial polluted factors harm the environment, it created imbalance between various factors of the environment and ultimately affects the existence of biotic factors. (v) The main threat to the ecosystem is the pollution of materials present in it. sometimes it may damage the ecosystem COMPLETELY in the course of time. (vi) In environment management, we take the task of protecting, conserving and preserving the natural COMPONENTS of the ecosystem. (vii) if we control the pollution, then the environmental management activities will succeed and the purpose will be served. (viii) if there is minimum pollution, then the nature cycles will CONTINUE without any disturbance and biodiversity can be enriched.

Discussion

3168.	Question : How will you induce lateral branching in a plant which normally does not produce them ? Give reason.
Answer» Solution :When apical bud is removed, LATERAL branches are PRODUCED. Removal of apical bud effect the AUXIN is destroyed inducing the lateral buds to GROW RAPIDLY

Discussion

3169.	Question : How ill you appreciate cell division that help perpetuation of life?
Answer» Solution :(1) Perpetuation means continuation of life . (2) Both mitotic and meiotic divisions are very essential for perpetuation of life. (3) In UNICELLULAR ORGANISMS, the mitotic cell divisions form the entire organisms. (4) Mitotic division is essential for all types of asexual reproductions. (5) In sexually reproducing organisms meiotic cell division helps in formation of gametes with haploid number of chromosmes to form zygote at the time of fertilization. (6) Zygote further divides by mitosis again and grows into an embryo and then to offspring. (7) Thus both mitotic and metotic cell division PLAY a key role in perpetuation of life . Without cell division, there is no perpetuation of life.

Discussion

3170.	Question : How will an organism be benefitted if it reproduces through spores?
Answer» SOLUTION :An organism will be benefitted if it reproduces through spores because : (i) It is a simpler and faster mode of reproduction. (ii) Spores being small and LIGHT, get easily dispersed through wind, water and animals. Thus, its dispersal becomes easier. (iii) Spores BEAR thick RESISTANT covering to enable them to survive even in UNFAVOURABLE conditions.

Discussion

3171.	Question : How will an organism be benefitted if it reproduces through spores ?
Answer» Solution :SPORES remain coated with protective envelope under unfavourable condition. This helps to SURVIVE in ADVERSE conditions. They germinate only after favourable conditions return. Thus organism is benefitted by spore FORMATION.

Discussion

3172.	Question : How were Leeches used in Ancient times?
Answer» Solution :Leeches were used in medicines from Ancient times. Until `19^("TH")` century, Leeches were used to draw blood from patients.to treat nervous system abnormalities, DENTAL PROBLEMS, skin diseases, and INFECTIONS.

Discussion

3173.	Question : How was the vegetable kale obtained from cabbage?
Answer» SOLUTION :Farmers carried out artificial selection of plants with SLIGHTLY LARGER leaves in the WILD cabbage and came up with a leafy vegetable called KALE.

Discussion

3174.	Question : How these needs depend upon the person's area in which they live?
Answer» Solution :People who LIVE in a village or TOWN are less DEPENDENT on FOREST than those who live in or NEAR the forest.

Discussion

3175.	Question : How the transmission of sexually transmitted diseases can be prevented during the sexual act ?
Answer» Solution :Using a CONDOM during SEXUAL ACT can HELP to prevent transmission of sexually TRANSMITTED diseases.

Discussion

3176.	Question : How the pollution caused by burning fossil fuels can be reduced ?
Answer» SOLUTION :The pollution caused by burning fossil fuels can be reduced by: (1) Increasing the efficiency of the combustion process. (2) Using various techniques to reduce the escape of HARMFUL gases and ashes into the surroundings. (3) USE of lead free petrol, nitrogen filter in exhaust pipe. ( 4 ) REGULAR check-up and servicing the vehicles, no vehicle zone, no vehicle day. (5) Use of CNG as fuel. (6) Use of public transport services, etc.

Discussion

3177.	Question : How the increase in demand for energy is affecting atmosphere?
Answer» Solution :Increased consumption of fossil FUELS RELEASES a LOT of POLLUTING gases such as `CO_2`, `SO_2`, oxides of nitrogen, etc. Some of there gases cause global warming causing climate change and also produce ACID rain.

Discussion

3178.	Question : What happens to the food once it enters our body ?
Answer» Solution :1) The alimentary canal is basically a long tube extending from the mouth to the anus. 2) Food is MASTICATED by our teeth in the mouth and mixed with saliva to make it slippery and wet. 3) Salivary glands secrete saliva which contains amylase that helps in the breakdown of carbohydrates into simple ones. 4) The soft food mixed with saliva passes through oesophagus or food pipe by wave like movements called peristaltic movements to the . stomach. 5) The gastric glands in the stomach secrete gastric juice that contains hydrochloric acid, PROTEIN digesting enzyme pepsin and mucus. 6) Bile juice secreted by liver and pancreatic juice secreted by pancreas release into the DUODENUM of small intestine. 7) Emulsification of fats is done by bile juice. Pancreatic juice contains enzyme trypsin for carrying on the process of digestion of proteins and lipase for fats . 8) Complete digestion of carbohydrates, fats and proteins takes place in the smallintestine by intestinal juice. 9) Finger-like projections present in the walls of small intestine are called villi. They absorb the digested food into the blood. 10) REST of thefood is sent into the large intestine where most of the water present in it is absorbed from the food. 11) This material is then expelled through the anus which is the last part of the alimentary canal.

Discussion

3179.	Question :How is the sex determined in human beings?
Answer» Solution :SEX of a child is dependent on the type of the MALE gamete fusing with the female gamete. Human beings possess 23 pairs of chromosomes. Out of these, 22 pairs are known as autosomes, while the remaining ONE pair comprises sex chromosomes (XX in females and XY in males). At the TIME of fertilisation, the egg cell fuses with the sperm cell, resulting in the formation of the zygote. If the egg cell carrying an X chromosome fuses with the sperm carrying an X chromosome, the resulting child WOULD be a girl. If the egg cell carrying an X chromosome fuses with the sperm carrying a Y chromosome, the resulting child would be a boy.

Discussion

3180.	Question : How nerve impulses are transferred from one neuron to next neuron?
Answer» Solution :All the INFORMATION from the environment are detected by the receptors, LOCATED in the SENSE organs such as the eyes, nose, skin and etc. Information from the receptors is transmitted as electrical impulse and is received by the dendritic tips of the neuron. This impulse travels from the dendrite to the cell body and then along the axon to its terminal end. On reaching the axonal end, it causes the nerve endings to RELEASE a chemical (neurotransmitter) which diffuses across a synapse and starts a similar electrical impulse in the dendrites of the next neuron, then to their cell body to be carried along the axon. The electrical signal REACHES the brain or spinal cord. The response from brain (or spinal cord) is similarly passed on to the effector organs such as the muscleor galnd cell, that undergoes the desired response.

Discussion

3181.	Question : How may speciation take place ?
Answer» Solution :Speciation may take PLACE by (i) MIGRATION (ii) Mutation (iii) GENETIC DRIFT (iv) Natural SELECTION

Discussion

3182.	Question : How many types of sperms are found in man?a.Oneb.Twoc.Threed.Four
Answer» ONE TWO THREE Four Answer :A

Discussion

3183.	Question : How many species are believed to exist on Earth at present time?
Answer» 5,000 to 10,000 APPROXIMATELY 100,000 approximately 500,000 between 5 MILLION and 30 million ANSWER :D

Discussion

3184.	Question : How many sex chromosomes are found in the reproductive cells (gametes) of human being?
Answer» 1 2 23 46 Answer :A

Discussion

3185.	Question : How many pollen mother cells will produce 1000 pollen grains?
Answer» 100 200 300 250 Answer :D

Discussion

3186.	Question : How many pairs of testes are present in leech?
Answer» SOLUTION :There are 11 pairs of TESTES are present in LEECH.

Discussion

3187.	Question : How many pairs of sex chromosomes are found in the somatic cells of the human being?
Answer» One Two THREE FOUR

Discussion

3188.	Question : How many pairs of craniel nerves are there in Peripheral Nervous System?
Answer» SOLUTION :12 PAIRS of craniel NERVES.

Discussion

3189.	Question :How many pairs of chromosomes are present in human beings? Out of these how many are sex chromosomes? How many types of sex chromosomes are found in human beings?
Answer» Solution :23 pairs of CHROMOSOMES are present in HUMAN BEINGS. ONE pair of these are sex chromosomes, Two TYPES of sex chromosomes are there: XX and XY.

Discussion

3190.	Question : How many oxygen molecules can be carried out by one haemoglobin molecule.
Answer» SOLUTION :FOUR MOLECULES of `O_(2)`

Discussion

3191.	Question : How many pairs of chromosomes are found in human beings?
Answer» Solution :23 PAIRS of chromosomes are FOUND in human BEINGS.

Discussion

3192.	Question : How many pairs of chromosomes are present in human beings?
Answer» SOLUTION :23 PAIRS.

Discussion

3193.	Question : How many ova are produced normally by each of the ovaries in a month?
Answer» SOLUTION :Each ovary produces ONE OVUM ALTERNATIVELY every month. (Once in two months there will be OVULATION from each of the ovaries)

Discussion

3194.	Question : How many of the 20 amino acids are essential amino acids for an adult human?
Answer» 6 8 11 14 Answer :B

Discussion

3195.	Question : How many number of pairs of sex chromosome are present in human zygote?
Answer» Four Three One Two Solution :In MALES XY and in FEMALES XX.

Discussion

3196.	Question : How many mature eggs does each ovary of a non-pregnant fertile woman typically produce each year?
Answer» 6 12 infinite depends on AGE FO woman Answer :B

Discussion

3197.	Question : How many lobes does the pituitary gland has?
Answer» 3 2 4 7 Answer :A

Discussion

3198.	Question : How many hearts are present in the blood vas cular system of Pheretima posthuma?
Answer» 6 PAIRS 2 pairs 1 pair 4 pairs ANSWER :D

Discussion

3199.	Question : How many chromosomes are present in a sperm and an ovum?
Answer» SOLUTION :SPERM and OVUM have 23 CHROMOSOMES each.

Discussion

3200.	Question : How many chromosomes are found in human cells ?
Answer» SOLUTION :46 (44 AUTOSOMES and a pair of sex CHROMOSOMES).

Discussion

Explore topic-wise InterviewSolutions in .

Question :Human genome contains about

Question : Himagiri developed by hybridisation and selection for disease resistance against rut pathogens is a variety of ____

Question : Human body is made up to trillons of cells. Why is it necessary for every cell to have the entir set of chromosomes pairs?

Question : How you can say that some animals rely entirely on environmental cues for sex determination ?

Question : How would you dispose the waste ? Plastic materials.

Question : How would you dispose the waste ? Industrial wastes like metallic cans.

Question : How would you dispose the waste ? Domestic wastes like vegetable peels.

Question : How would you dispose the following wastes? a. Domestic wastes like vegetable peels b. Industrial wastes like metallic cans Can the disposal protect the environment? How?

Question : How would our lives change if we could no longer get electricity supply ?

Question : How would these advantages differ from the advantages of using a long-term perspective in managing our resources ?

Question : How will you prevent soil erosion?

Question : How will you stain a microscopic slide showing mitosis in onion roots ?

Question : How will you justify that overcoming the pollution is a powerful way of environmental management?

Question : How will you induce lateral branching in a plant which normally does not produce them ? Give reason.

Question : How ill you appreciate cell division that help perpetuation of life?

Question : How will an organism be benefitted if it reproduces through spores?

Question : How will an organism be benefitted if it reproduces through spores ?

Question : How were Leeches used in Ancient times?

Question : How was the vegetable kale obtained from cabbage?

Question : How these needs depend upon the person's area in which they live?

Question : How the transmission of sexually transmitted diseases can be prevented during the sexual act ?

Question : How the pollution caused by burning fossil fuels can be reduced ?

Question : How the increase in demand for energy is affecting atmosphere?

Question : What happens to the food once it enters our body ?

Question :How is the sex determined in human beings?

Question : How nerve impulses are transferred from one neuron to next neuron?

Question : How may speciation take place ?

Question : How many types of sperms are found in man?a.Oneb.Twoc.Threed.Four

Question : How many species are believed to exist on Earth at present time?

Question : How many sex chromosomes are found in the reproductive cells (gametes) of human being?

Question : How many pollen mother cells will produce 1000 pollen grains?

Question : How many pairs of testes are present in leech?

Question : How many pairs of sex chromosomes are found in the somatic cells of the human being?

Question : How many pairs of craniel nerves are there in Peripheral Nervous System?

Question :How many pairs of chromosomes are present in human beings? Out of these how many are sex chromosomes? How many types of sex chromosomes are found in human beings?

Question : How many oxygen molecules can be carried out by one haemoglobin molecule.

Question : How many pairs of chromosomes are found in human beings?

Question : How many pairs of chromosomes are present in human beings?

Question : How many ova are produced normally by each of the ovaries in a month?

Question : How many of the 20 amino acids are essential amino acids for an adult human?

Question : How many number of pairs of sex chromosome are present in human zygote?

Question : How many mature eggs does each ovary of a non-pregnant fertile woman typically produce each year?

Question : How many lobes does the pituitary gland has?

Question : How many hearts are present in the blood vas cular system of Pheretima posthuma?

Question : How many chromosomes are present in a sperm and an ovum?

Question : How many chromosomes are found in human cells ?