22339 + Interview Questions in Biology in Class 11 Page 437 InterviewSolution

21801.	Question : A fungus that produce an antibiotic penicillin belongs to this class
Answer» DEUTEROMYCETES ASCOMYCETES BASIDIOMYCETES Phycomycetes Answer :B

Discussion

21802.	Question : A fungus Albugo that lives as a parasite on mustard belongs to class
Answer» Ascomycetes Basidiomycetes Phycomycetes DEUTEROMYCETES ANSWER :C

Discussion

21803.	Question : A fungal spore :
Answer» contains an embryonic ORGANISM germinates DIRECTLY into an organism is always windblown both (b) and (C) ANSWER :D

Discussion

21804.	Question : A fruit is:
Answer» a ripened ovary an ENLARGED ovule an enlarged aggregate of several flowers a MATURE FEMALE gametophyte Solution :a ripened ovary

Discussion

21805.	Question : A fruit in which the fruit wall (pericarp) and seed coat have got fused is called ________
Answer» Legume CARYOPSIS Nut Drupe Solution :Caryopsis

Discussion

21806.	Question : A frog's tadpole becomes ammonotelic while the adult frog becomes ureotelic. Why?
Answer» Solution :Tadpole – AQUATIC adaptations, so AMMONOTELIC. FROG - terrestrial ADAPTATION, so ureotelic

Discussion

21807.	Question : A frog with body temperature of 20^@C is transferred to an area with 30^@C temperature. What will be the body temperature of frog in the new environment?
Answer» `20^@C` `30^@C` `25^@C` FLUCTUATES between `20^@C – 30^@C` Answer :B

Discussion

21808.	Question : A four year old boy touched a hot pan. He suddenly withdraws his hand. What is his response called?
Answer» SOLUTION :REFLEX ACTION

Discussion

21809.	Question : A fragment of DNA has 480 nucleotides out of which 110 are those of adenine. The number of cytosine nucleotides is
Answer» 110 130 220 240 Answer :B

Discussion

21810.	Question : A four-chambered heart is not found in(a) birds(b) mammals(c) snakes(d) crocodiles
Answer» birds mammals snakes crocodiles

Discussion

21811.	Question : A four chambered heart is not found in ………………… .
Answer» MAMMALS BIRDS SNAKE CROCODILE SOLUTION :Snake

Discussion

21812.	Question :A four-chambered heart is characteristic of :(a) bony fish(b) mammals(c) amphibians(d) none of these
Answer» BONY FISH MAMMALS AMPHIBIANS NONE of these Solution :mammals

Discussion

21813.	Question : A fossil bird ____
Answer» SOLUTION :ARCHAEOPTERYX

Discussion

21814.	Question : A food chain starts with......
Answer» NITROGEN FIXATION organisms Photosynthesising organisms Consumers Decomposers Answer :B

Discussion

21815.	Question :A flowering plant is planted in an earthen pot and irrigated. Urea is addedto make the plant grow faster, but after some time the plant dies. Give itspossible reason.
Answer» Solution : Due to EXOSMOSIS i.e., WATER COMES out the PLANT

Discussion

21816.	Question : A flowering plant is planted in an earthen pot and irrigated. Urea is added to make the plant grow faster, but after sometime the plant dies. This may be due to ....
Answer» SOLUTION :The PLANT dies DUE to exosmosis because due to exosmosis, there is UREA outside, so the solution becomes HYPERTONIC.

Discussion

21817.	Question : A flowering plant is planted in an earthen pot and irrigated. Urea is added in high amouts to make the plant grow faster but after same time the plant died. This may be due to "_______"
Answer» EXOSMOSIS endosmosis water logging suffocation Solution : Urea solution is more concentrated than the sap present in PLANT CELLS so plant cells LOSE water to the soil through the process of exosmosis Loss of water caused plant to die.

Discussion

21818.	Question : A flower with sepals, petals, stamens and carpels is said tobe :
Answer» COMPLETE INCOMPLETE ACTINOMORPHIC IMPERFECT SOLUTION :complete

Discussion

21819.	Question :A flower which never opens and its pollen grains germinate inside the anther and their pollen tubes enter the carpels to fertilise the ovules is called
Answer» POLYGAMOUS CLEISTOGAMOUS Cleistocarpic AUTOGAMOUS ANSWER :B

Discussion

21820.	Question : A flower with a superior ovary is called
Answer» HYPOGYNOUS perigynous epigynous SYNCARPOUS

Discussion

21821.	Question : A flower which can be divided into equal vertical halves, by more than one plane of division is………………
Answer» zygomorphic cyclic ACTINOMORPHIC heteromorphic Solution :actinomorphic

Discussion

21822.	Question : A flower that has only stamens is called
Answer» UNISEXUAL FLOWER BISEXUAL flower COMPLETE flower NEUTER flower

Discussion

21823.	Question :A flower on a dioecious plant would be
Answer» complete bisexual asexual unisexual Answer :D

Discussion

21824.	Question : A flower of tomato plant following the process of sexual reproduction produces 240 viable seeds. What is the minimum number of microspore mother cells involved in this process?
Answer» SOLUTION :60 MICROSPORE MOTHER cells are involved in providing 240 pollen grains. Because each microspore mother CELL undergoes meiosis producing four pollen grains (i.e., `60xx4=240`). Each pollen grain produces two male gametes of which one undergoes true fertilization of ovule producing seeds. other male gamete participate in DOUBLE fertiilization.

Discussion

21825.	Question : A flower of mustard is
Answer» ACTINOMORPHIC BISEXUAL HYPOGYNOUS All the above ANSWER :D

Discussion

21826.	Question : A flower is
Answer» A modified shoot The REPRODUCTIVE unit of angiosperms The reproductive unit of GYMNOSPERMS Both (1) and (2) Answer :D

Discussion

21827.	Question : A. Flemming isolated penicillin from:
Answer» P.Chrysogenum P.notatum Aspergillus flavua A.Niger ANSWER :B

Discussion

21828.	Question : A few statements with regard to sexual reproduction are given below (i) Sexual reproduction does not always require two individuals (ii) Sexual reproduction generally involves gametic fusion (iii) Meiosis never occurs during sexual reproduction (iv) External fertilisation is a rule during sexual reproduction Choose the correct statements from the options below
Answer» I and IV I and II II and III I and III Answer :B

Discussion

21829.	Question :A fibre yielding fodder crop of Fabaceae is
Answer» SESBANIA sesban Phaseolus AUREUS Gossypium herbaccum Crotalaria JUNCEA Answer :D

Discussion

21830.	Question : A few statements describing certain features of production are given below (I) gametic fusion takes place (II) transfer of genetic material takes place (III) reduction division takes place (IV) progeny have resemblance with parents How many of the above statements are true for asexual and sexual reproduction
Answer» I and II II and III II and IV I and III Answer :C

Discussion

21831.	Question : A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it is phloem sap ?
Answer» Acidic Alkaline Low REFRACTIVE index Absence of sugar Answer :B

Discussion

21832.	Question :A fern differs from a moss in having : (a) ciliated antherozoids(b) an independent sporophyte(c) a dependent gametophyte(d) heteromorphic alternation of generations
Answer» CILIATED antherozoids an INDEPENDENT SPOROPHYTE a DEPENDENT gametophyte heteromorphic ALTERNATION of generations Solution :an independent sporophyte

Discussion

21833.	Question : A fern differs from a moss in possessing
Answer» Swimming/flagellate antherozoids Flask - SHAPED archegonia Independent sporophyte Independent gametophyte Answer :C

Discussion

21834.	Question : A feature of Osteichthyes is
Answer» hypotrematic placoid SCALES ureotelic 4 PAIRS of GILLS ANSWER :D

Discussion

21835.	Question : A farmer observed drops of water along the margins of leaves of tomato plants growing in his well irrigated field on a winter morning. Give reasons for this occurrence. Why the water drops appeared only along the leaf margins?
Answer» Solution :Exudation of water drops from the margins of leaves is known as guttation. Under conditions favouring high root pressure and low TRANSPIRATION. Water drops OOZE from the margins of leaves through some specialised structures known as hydathodes. A hydathode has a terminal PORE surrounded and subtended by loosely arranged uncutinised cells with large intercellular spaces (epithem). SINCE these cells are located above a vein ending the water drops appeared only ALONG the leaf margins.

Discussion

21836.	Question : A farmer grows cucumber plants in his field. He wants to increase the number of female flowers in them. Which plant growth regulator can be applied to achieve this?
Answer» Solution :Ethylene is a gaseous plant hormone. It is primarily responsible for ripening of fruits. Ethylene is also responsible to play a major role in determining the sex of monoecious flowers and is ASSOCIATED with the promotions of femaleness in plants THUS the farmer must spray ethylene hormone on this CUCUMBER crop to produce FEMALE flowers and to increase the yield.

Discussion

21837.	Question : A farmer grows cucumber plants in his field. He wants to increase the number of female flowers in them. Which plant growth hormone can be applied to achieve this/
Answer» SOLUTION :Auxin can be used to increase the NUMBER of FEMALE FLOWERS

Discussion

21838.	Question : A farmer adds/supplies Na, Ca, Mg and Fe regularly to his field and yet he observes that the plants show deficiency of ca,Mg and Fe Give a valid reason and suggest a way to help the farmer improve the growth of plants.
Answer» Solution :Plants bear micronutrient in PARTICULAR amounts. Their moderate decrease CAUSES the deficiency of symptoms and a moderate increase causes toxicity. Any mineral ion concentration reduces the dry weight of tissues about 10% is considered toxic. Such concentration vary widely among micronutrients. It is different for defferent plants. FOr eg. The amount of `MN^(+2)600 mu gg^-1` is more toxic to soyabean and more than 5300 `mu gg^-1` it is toxic for sunflower. OR `5300 mu gg^-1` is more toxic for sunflower. It is ALSO seen that toxicity of one micro nutrient causes the deficiency of other ELEMENT. For its cure farmer must use mineral element is fixed concentration. SO absorption of one element does not eliminate absorption of other element.

Discussion

21839.	Question : A farmer adds azotobacter culture to soil before sowing maize. Which mineral element is being replenished?
Answer» Solution :Azotobacter is a free LIVING bacteria. It helps in nitrogen fixation. IF a farmer adds azotobacter culture in soil the PROCESS of nitrogen fixation will be INCREASED.

Discussion

21840.	Question : A fall in glomerular filtration rate (GFR).....
Answer» Juxtaglomerular cells to RELEASE renin ADRENAL CORTEX to release aldosterone Adrenal medulla to release adernaline Posterior pituitary to release ADH SOLUTION :Juxtaglomerular cells to release renin

Discussion

21841.	Question : A eukaryotic organelle that can best be seen with the lightmicroscope is the :
Answer» ENDOPLASMIC reticulum NUCLEUS polyribosome MICROTUBULE SOLUTION :nucleus

Discussion

21842.	Question : A : Ethylene is a gaseous phytohormone. R: It promotes ripening of many fruits.
Answer» A and R both are CORRECT and R is correct EXPLANATION of A. A and R are correct but R is not explanation of A. A is correct and R is false. A and R are false Answer :B

Discussion

21843.	Question : A dry, one-celled and one-seeded fruit developing from a bicarpellary, inferior ovary often with persistent pappus is termed as
Answer» Nut Cypsela CARYOPSIS ACHENE ANSWER :B

Discussion

21844.	Question : A drupe develops in
Answer» Mango Wheat Pea Tomato ANSWER :A

Discussion

21845.	Question : A drop of each of the following is placed separately on four sides. Which of them will not coagulate ?
Answer» Whole blood from PULMONARY vein Blood PLASMA Blood serum Sample from the THORACIC duct of lymphatic system Answer :C

Discussion

21846.	Question : Draw and label the structure of Mitochondira.
Answer» SOLUTION :(a) STRUCTURE of MITOCHONDRION : (b) Since huge AMOUNT of energy is generated in mitochondria in the form of ATP molecules they are called 'power house of the cell'.

Discussion

21847.	Question : A double membrane encloses which two organelles?
Answer» SOLUTION : PLASTID, MITOCHONDRION.

Discussion

21848.	Question : A double membrane cell organelle absent in fungi
Answer» Plastids Mitochondria Nucleus 1 & 3 Answer :A

Discussion

21849.	Question : A dorsiventral Leaf
Answer» Solution :In a dicot LEAF a different type of MESOPHYLL tissue is LOCATED in upper EPIDERMIS and lower epidermis. So it is CALLED a dorsiventral leaf.

Discussion

21850.	Question : A dorsiventral leaf is identified by the presence of
Answer» STOMATA on both the epidermis stomata on the UPPER epidermis only stomata on the LOWER epidermis only no stomata on the epidermis Answer :C

Discussion

Explore topic-wise InterviewSolutions in .

Question : A fungus that produce an antibiotic penicillin belongs to this class

Question : A fungus Albugo that lives as a parasite on mustard belongs to class

Question : A fungal spore :

Question : A fruit is:

Question : A fruit in which the fruit wall (pericarp) and seed coat have got fused is called ________

Question : A frog's tadpole becomes ammonotelic while the adult frog becomes ureotelic. Why?

Question : A frog with body temperature of 20^@C is transferred to an area with 30^@C temperature. What will be the body temperature of frog in the new environment?

Question : A four year old boy touched a hot pan. He suddenly withdraws his hand. What is his response called?

Question : A fragment of DNA has 480 nucleotides out of which 110 are those of adenine. The number of cytosine nucleotides is

Question : A four-chambered heart is not found in(a) birds(b) mammals(c) snakes(d) crocodiles

Question : A four chambered heart is not found in ………………… .

Question :A four-chambered heart is characteristic of :(a) bony fish(b) mammals(c) amphibians(d) none of these

Question : A fossil bird ____

Question : A food chain starts with......

Question :A flowering plant is planted in an earthen pot and irrigated. Urea is addedto make the plant grow faster, but after some time the plant dies. Give itspossible reason.

Question : A flowering plant is planted in an earthen pot and irrigated. Urea is added to make the plant grow faster, but after sometime the plant dies. This may be due to ....

Question : A flowering plant is planted in an earthen pot and irrigated. Urea is added in high amouts to make the plant grow faster but after same time the plant died. This may be due to "_______"

Question : A flower with sepals, petals, stamens and carpels is said tobe :

Question :A flower which never opens and its pollen grains germinate inside the anther and their pollen tubes enter the carpels to fertilise the ovules is called

Question : A flower with a superior ovary is called

Question : A flower which can be divided into equal vertical halves, by more than one plane of division is………………

Question : A flower that has only stamens is called

Question :A flower on a dioecious plant would be

Question : A flower of tomato plant following the process of sexual reproduction produces 240 viable seeds. What is the minimum number of microspore mother cells involved in this process?

Question : A flower of mustard is

Question : A flower is

Question : A. Flemming isolated penicillin from:

Question :A fibre yielding fodder crop of Fabaceae is

Question : A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it is phloem sap ?

Question :A fern differs from a moss in having : (a) ciliated antherozoids(b) an independent sporophyte(c) a dependent gametophyte(d) heteromorphic alternation of generations

Question : A fern differs from a moss in possessing

Question : A feature of Osteichthyes is

Question : A farmer observed drops of water along the margins of leaves of tomato plants growing in his well irrigated field on a winter morning. Give reasons for this occurrence. Why the water drops appeared only along the leaf margins?

Question : A farmer grows cucumber plants in his field. He wants to increase the number of female flowers in them. Which plant growth regulator can be applied to achieve this?

Question : A farmer grows cucumber plants in his field. He wants to increase the number of female flowers in them. Which plant growth hormone can be applied to achieve this/

Question : A farmer adds/supplies Na, Ca, Mg and Fe regularly to his field and yet he observes that the plants show deficiency of ca,Mg and Fe Give a valid reason and suggest a way to help the farmer improve the growth of plants.

Question : A farmer adds azotobacter culture to soil before sowing maize. Which mineral element is being replenished?

Question : A fall in glomerular filtration rate (GFR).....

Question : A eukaryotic organelle that can best be seen with the lightmicroscope is the :

Question : A : Ethylene is a gaseous phytohormone. R: It promotes ripening of many fruits.

Question : A dry, one-celled and one-seeded fruit developing from a bicarpellary, inferior ovary often with persistent pappus is termed as

Question : A drupe develops in

Question : A drop of each of the following is placed separately on four sides. Which of them will not coagulate ?

Question : Draw and label the structure of Mitochondira.

Question : A double membrane encloses which two organelles?

Question : A double membrane cell organelle absent in fungi

Question : A dorsiventral Leaf

Question : A dorsiventral leaf is identified by the presence of