1512 + Interview Questions in Biology in Class 9 Page 24 InterviewSolution

1151.	Question : Canal system is seen in coelenterates.
Answer» SOLUTION :CANAL SYSTEM is SEEN in PORIFERA.

Discussion

1152.	Question : Influenza is a respiratory disease.
Answer» ANSWER :TRUE

Discussion

1153.	Question : Can you name the two organelles we have studied that contain their own genetic material?
Answer» SOLUTION :Mitochondria and plastids are the two ORGANELLES that contain their own GENETIC material.

Discussion

1154.	Question : Infectious disease and Non-infectious disease.
Answer» SOLUTION :

Discussion

1155.	Question : Can you guess why there are sweat glands on the palm of our hands and the soles of our feet ?
Answer» Solution :Sweating is IMPORTANT for thermal regulation. Sweat WORKS as a defense against microbes to which our hands and feet are MOSTLY EXPOSED than the other parts of our body.

Discussion

1156.	Question : Infectious agent responsible for sleeping sickness is………..
Answer» ANSWER :TRYPANOSOMA

Discussion

1157.	Question : Calculate the number mass of following substance. a) Ethyne , C_2 H_2 O b) Sulphur molecule , S_8 Phosphorus molecules , P_4d) Nitric acid, HNO_3 Nitric and , HNO_3
Answer» Solution :Molar mass of ethyne , `C_2 H_2 = 2xx 12 + 2 xx 1` = 26 g b) SULPHUR molecule, `S_8` Molar mass of Sulphur molecule, `S_8 = 8 xx 32 = 256 g` c) Phosphorus MOLECULS, `P_4` Molar mass of phosphorus molecule, `P_4 = 4 xx 31` `=124` g d) Hydrochloric acid , HCl Molar mass of hydrochloric acid HCl = 1+ 35.5 =36.5 g Nitric acid, `HNO_3` Molar mass of Nitric acid, `HNO_3 = 1+14 + 3xx16=63` g

Discussion

1158.	Question : India has ………….. Major river basins and …………… composite river basins that form the surface water resource.
Answer» ANSWER :12, 8;

Discussion

1159.	Question : Calculate the molermass of the following substances a) Ethyne, C_(2)H_(2) b) Sulphur moelcular, S_(8) c) Ohosphorus molecule - P_(4) d) Nitric acid , HNO_(3)
Answer» Solution :a) Ethyne, `C_(2)H_(2)`. Molar MASS of ethyne, `C_(2)H_(2)=2xx12+2xx1=26g` b) Sulphur molecule , `S_(8)` Molar mass of Sulphur molecule, `S_(8)=8xx32=256g` C)Phosphorus molecule, `P_(4)` Molar mass of phosphorus molecule, `P_(4)=4xx31=124g` d) HYDROCHLORIC acid, HCl Molar Mass of hydrochloric acid HCl `=1+35.5=36.5` g e) Nitric acid, `HNO_(3)` Molar mass of Nitric acid, `HNO_(3)=1+14+3xx16=63`g

Discussion

1160.	Question : By which systems is cach field supplied water by rotation?
Answer» RIVER LIFT SYSTEM Wells Canal system Tanks Answer :A::C

Discussion

1161.	Question : India is a country with three fouth of the population engaged in agriculture. Even though financial conditions of some farmers do allow them to take higher level farming practices and improved agricultural technology. Yet they are hesitant to use of HYV seeds with traits such as resistance to disease and pests, igh quality that would result finally in higher yield. THE Governments' Kisan channel solved all their apprehensions. 1. What is meant by genetically modified crops ? 2. What are the desired agronomic characters for fodder adn cereal crops? 3. In your opinion what should be done so that the modern agriculture technology is adopted by most of the farmers?
Answer» Solution :1. Genetically modified crops are produced by manipulating the genes o the ORIGINAL crops. The desirable gene which is useful for us, is introduced into the crop by recombinant DNA TECHNOLOGY. The crop thus gets genetically modified in the future generation. 2. 3. Agricultural information should be passed to farmers through channels like KISAN. The NEWER varieties whcih are adapted to the changing climate or salinity are beings experimented upon The information of these TYPE of crops should be understood by the persons who are involved in the agriculture.

Discussion

1162.	Question : By what is AIDS caused ?
Answer» Virus Fungi Bacteria Protozoan Answer :A

Discussion

1163.	Question : Increased loading of nutrients in the water body results in algal bloom. Then, how is eutrophication harmfl to equatic life ?
Answer» SOLUTION :REFER to ARTICLE 5.4.3 on PAGE 235.

Discussion

1164.	Question : By what can the desirable characters be incorporateinto crop varieties?
Answer» SOLUTION :By HYDRIDISATION

Discussion

1165.	Question : By what can nutrient be provided to the crops?
Answer» Maure Fertilizers Both A and B NONE of these Answer :C

Discussion

1166.	Question : Increased amount of ……… in the atmosphere, results in greenhouse effect and global warming
Answer» CARBON monoxide sulphur DIOXIDE nitrogen dioxide carbon dioxide Solution :carbon dioxide

Discussion

1167.	Question : By given the example of a tree explain various types species diversity.
Answer» ANSWER :N/a

Discussion

1168.	Question : In which stage of mitosis the chromosomes align in an equatorial plate? How?
Answer» Solution :The chromosomes align in an equatorial plate during METAPHASE stage of MITOSIS. Each chromosome GETS attached to a spindle fibre by its centromere which is known as the chromosomal fibre. During metaphase the sister CHROMATIDS are pulled back and FORTH until they align along the equator of the cell called equatorial plane.

Discussion

1169.	Question : Bulbul read an article on AIDS - A killer syndrome in a leading newspaper. She also recalled that few days back there was a declamation contest in his school is AIDS where is participants expressed their views about its cause, way of transmission, symptoms and possible preventive measures. As a responsible citizen, Bulbul wanted to explain detail of AIDS disease to her friends who had no knowledge about it? (i) Expand the abbreviation AIDS Name its causative organism. (ii) Why AIDS is counsidered a syndrome and not merely a disease. Comment. (iii)List at least three ways in which AIDS can be transmitted from an infected person to other. (iv) What values are displayed by Bulbul.
Answer» Solution :(i) AIDS- Acquired Immuno Deficiency Syndrome. it is caused by retrovirus- HIV (Human Immunodeficiency Virus). (ii) AIDS is considered as asyndrome and not a disease. It is so because AIDS causing virus (HIV) enters the body of healthy person generally through sexual ORGANS or through blood transfusion and subsequently spreads to lumph nodes all over the body. It damages body's immune system and therefore, body is no longer is able to fight of many minor infections. Even a small cold infection can turn into pneumonia or a minor gut infection may LEAD to severe diarrhoea with blood loss. The effects of minor diseases become so severe that they kill the patients sufferring from AIDS. In other words, THEREARE no specific disease symptoms for AIDS and the PATIENT develops complex diseases and symptoms. AIDS is considered to be a syndrome and not merely adisease. (iii) (a) use of contaminated needles and syringes to inject drugs and vaccines. Use of contaminated razors for shaving. (b) Transfusion of infected blood or blood PRODUCTS. (c) Unprotected sexual contact wiht an AIDS infected person. (iv) Bulbul, being adolescent, wanted to help her friends by imparting knowledge about dreaded fatal AIDS disease so that they take necessary preventive measures.

Discussion

1170.	Question : In which plant group do seed and fruits develop ?
Answer» SOLUTION :ANGIOSPERM

Discussion

1171.	Question : Buffaloes cannot yield milk in water.
Answer» ANSWER :F

Discussion

1172.	Question : In which pattern of cropping, soya bean and maize are sown in rows?
Answer» SOLUTION :INTER CROPPING

Discussion

1173.	Question :Bryophyta and Pteridophyta plants are Cryptogams (non-flowering plants).
Answer» ANSWER :T

Discussion

1174.	Question :Bryophyta are called amphibians of the plant kingdom.
Answer» ANSWER :T

Discussion

1175.	Question : In which part of the body of a bird would you find pecten ?
Answer» Eye Nose Leg Ear Answer :A

Discussion

1176.	Question : Bring out any two differences between input and output devices.
Answer» SOLUTION :

Discussion

1177.	Question : In which organisms is membrane absent surrounding the nucleus and organelles ?
Answer» Prokaryotes Eukaryotes Haploid Diploid ANSWER :A

Discussion

1178.	Question : Brain lies in the thorax of cockroach.
Answer» ANSWER :F

Discussion

1179.	Question : In which organ of human body can roundworm Ascaris lumbricoides be seen ?
Answer» Oesophagus Stomach Liver Small intestine Answer :D

Discussion

1180.	Question : Brackish water resources are important fish reservoirs but still in inlandwater bodies the yield is not high. So peopole adopt aquaculture. A son persuaded his father, a farmer, to do fish culture in that paddy field and also in a pond near his house to increase the yield. 1. What is meat by brackish water? 2. What can be done to get maximum fish yield from the pond? 3. How son's work is appreciable?
Answer» Solution :1. Brackish water is water of lesser salinity. In estuaries and lagoons, fresh and saline wter mix with each other. Such places are important fish reservoirs. 2. Since the natural fish population is limited, aquaculture ca be practiced for increasing the fish yield. Ina pond the fish SEED ca be introduce. This fish seed is in the form of larvaei. It should be selected by considering theappropriate local conditions. The species selected should THRIVE well, grow fast and yield good market price. COMPOSITE fish culture method can also be used. All such practices can give the maximum fish yield from the pond. 3. Son has carried out fish farming in two areas. One is inpaddy, where along with the rice crop the released fish seed too grow. Therefore, along with harvest of rice, the fish or prawns are ready to be harvested. Fish farming in pond also must have fetched good results. Therefore son.s work is appreciable. Son SHOWS values of innovatice practices in fishery.

Discussion

1181.	Question : Bone and cartilage are two types of areolar connective tissue
Answer» SOLUTION :Correct statement: BONE and CARTILAGE are TWO TYPES of supportive connective tissue.

Discussion

1182.	Question : In which of the following case do you think the long-term effects on your health are likely to be most unpleasant 1. If you get jaundice 2. If you get lice (3) Why?
Answer» SOLUTION :(1) Jaundice is a chronic DISEASE in which liver and other metabolism of the body is affected. (2) This is not long-term Therefore, jaundice is the most unpleasent conditionas it CAUSES long-term EFFECTS on the health.

Discussion

1183.	Question : Blood is a ………. Tissue
Answer» ANSWER :FLUID CONNECTIVE.

Discussion

1184.	Question :In which kingdom will you place an organism which is single-celled, eukaryotic and photosynthetic ?
Answer» SOLUTION : Protista is the kingdom in which an organism which is single-celled, eukaryotic and photosynthetic is placed. Such ORGANISMS are UNICELLULAR algae.

Discussion

1185.	Question : Blood cells are found in the …….
Answer» ANSWER :PLASMA.

Discussion

1186.	Question : Birds respire with
Answer» lungs gills skin none of these Answer :A

Discussion

1187.	Question : In which kingdom are the protozoa, lichens and algae included ?
Answer» Monera PROTISTA Plantae Cyanophyta SOLUTION :Protista

Discussion

1188.	Question : Bipinnaria is the larva of Mollusca.
Answer» SOLUTION :BIPINNARIA is the LARVA of ECHINODERMATA

Discussion

1189.	Question : In which instrument following are essential ? (i) Internal vacuum (ii) Use of electromagnets (iii) Use of beam of electrons.
Answer» ANSWER :ELECTRON MICROSCOPE.

Discussion

1190.	Question : In which group of plants seed are protected by fruits ?
Answer» ANSWER :N/a

Discussion

1191.	Question : Biologists ......... and ......... presented the cell theory.
Answer» SOLUTION :SCHLEIDEN, SCHWANN

Discussion

1192.	Question : In which form is starch transported to various parts of the plant body for storage?
Answer» ANSWER :SUCROSE

Discussion

1193.	Question : In which farming system, the man made chemcials are not used?
Answer» SOLUTION :ORGANIC farmin

Discussion

1194.	Question : In which class of vertebrate animals is the heart three-chambered ?
Answer» SOLUTION :AMPHIBIA

Discussion

1195.	Question : Binomial name of Nilavembu is Leucas aspera.
Answer» SOLUTION :FALSE

Discussion

1196.	Question :In which animal phylum, true body cavity appears for the first time?
Answer» SOLUTION :Annelida is the animal phylum in which true BODY cavity appeared for the first TIME.

Discussion

1197.	Question : Bile, secreted by liver is stored temporarily in......................
Answer» ANSWER :the GALL BLADDER

Discussion

1198.	Question : In the process of storing the energy of the cell, what is used as a cellular currency?
Answer» DNA RNA Amino acid ATP Answer :A

Discussion

1199.	Question : In the lower part of which organ does Helicobactor pylort cause de symptoms of inflammation ?
Answer» LUNGS STOMACH LIVER Intestine Answer :B

Discussion

1200.	Question : Bile helps in the digestion of................
Answer» PROTEINS SUGAR Fats Carbohydrates Answer :C

Discussion

Explore topic-wise InterviewSolutions in .

Question : Canal system is seen in coelenterates.

Question : Influenza is a respiratory disease.

Question : Can you name the two organelles we have studied that contain their own genetic material?

Question : Infectious disease and Non-infectious disease.

Question : Can you guess why there are sweat glands on the palm of our hands and the soles of our feet ?

Question : Infectious agent responsible for sleeping sickness is………..

Question : Calculate the number mass of following substance. a) Ethyne , C_2 H_2 O b) Sulphur molecule , S_8 Phosphorus molecules , P_4d) Nitric acid, HNO_3 Nitric and , HNO_3

Question : India has ………….. Major river basins and …………… composite river basins that form the surface water resource.

Question : Calculate the molermass of the following substances a) Ethyne, C_(2)H_(2) b) Sulphur moelcular, S_(8) c) Ohosphorus molecule - P_(4) d) Nitric acid , HNO_(3)

Question : By which systems is cach field supplied water by rotation?

Question : By what is AIDS caused ?

Question : Increased loading of nutrients in the water body results in algal bloom. Then, how is eutrophication harmfl to equatic life ?

Question : By what can the desirable characters be incorporateinto crop varieties?

Question : By what can nutrient be provided to the crops?

Question : Increased amount of ……… in the atmosphere, results in greenhouse effect and global warming

Question : By given the example of a tree explain various types species diversity.

Question : In which stage of mitosis the chromosomes align in an equatorial plate? How?

Question : In which plant group do seed and fruits develop ?

Question : Buffaloes cannot yield milk in water.

Question : In which pattern of cropping, soya bean and maize are sown in rows?

Question :Bryophyta and Pteridophyta plants are Cryptogams (non-flowering plants).

Question :Bryophyta are called amphibians of the plant kingdom.

Question : In which part of the body of a bird would you find pecten ?

Question : Bring out any two differences between input and output devices.

Question : In which organisms is membrane absent surrounding the nucleus and organelles ?

Question : Brain lies in the thorax of cockroach.

Question : In which organ of human body can roundworm Ascaris lumbricoides be seen ?

Question : Bone and cartilage are two types of areolar connective tissue

Question : In which of the following case do you think the long-term effects on your health are likely to be most unpleasant 1. If you get jaundice 2. If you get lice (3) Why?

Question : Blood is a ………. Tissue

Question :In which kingdom will you place an organism which is single-celled, eukaryotic and photosynthetic ?

Question : Blood cells are found in the …….

Question : Birds respire with

Question : In which kingdom are the protozoa, lichens and algae included ?

Question : Bipinnaria is the larva of Mollusca.

Question : In which instrument following are essential ? (i) Internal vacuum (ii) Use of electromagnets (iii) Use of beam of electrons.

Question : In which group of plants seed are protected by fruits ?

Question : Biologists ......... and ......... presented the cell theory.

Question : In which form is starch transported to various parts of the plant body for storage?

Question : In which farming system, the man made chemcials are not used?

Question : In which class of vertebrate animals is the heart three-chambered ?

Question : Binomial name of Nilavembu is Leucas aspera.

Question :In which animal phylum, true body cavity appears for the first time?

Question : Bile, secreted by liver is stored temporarily in......................

Question : In the process of storing the energy of the cell, what is used as a cellular currency?

Question : In the lower part of which organ does Helicobactor pylort cause de symptoms of inflammation ?

Question : Bile helps in the digestion of................