Presticides are used to destroy (1) micro-organisms (2) poisonous substances in soil (3) poisonous plants (4) insects

Presticides are used to destroy (1) micro-organisms (2) poisonous substances in soil (3) poisonous plants (4) insects
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Presticides are used to destroy – (1) micro-organisms (2) poisonous substances in soil (3) poisonous plants (4) insects

Description : Presticides are used to destroy – (1) micro-organisms (2) poisonous substances in soil (3) poisonous plants (4) insects

Last Answer : (4) insects Explanation: A pesticide is generally a chemical or biological agent (such as a virus, bacterium, antimicrobial or disinfectant) that through its effect deters, incapacitates, kills or ... , plant pathogens, weeds, mollusks, birds, mammals, fish, nematodes (roundworms), and microbes.

What poisonous substances naturally produced by bacteria plants snakes insects and other living organisms?

Description : What poisonous substances naturally produced by bacteria plants snakes insects and other living organisms?

Last Answer : what provides the best protection against gamma rays

Assertion : Organichlorine presticides are organic compounds that have been chlorinated. Reason:Fenitrothion is one of the organochlorine pesticides.

Description : Assertion : Organichlorine presticides are organic compounds that have been chlorinated. Reason:Fenitrothion is one of the organochlorine pesticides.

Last Answer : Assertion : Organichlorine presticides are organic compounds that have been chlorinated. Reason:Fenitrothion is ... reason is wrong D. Both are wrong

In the process of eating the remains of dead organisms and their wastes earthworms aerate and fertilize the soil. They are also a source of food for many birds snakes and insects. Which term best desc?

Description : In the process of eating the remains of dead organisms and their wastes earthworms aerate and fertilize the soil. They are also a source of food for many birds snakes and insects. Which term best desc?

Last Answer : Decomposer

Systemic insecticides (A) Are absorbed throughout the plant (B) Kill insects following external bodily contact (C) Are stomach poisons (D) Emit poisonous vapour

Description : Systemic insecticides (A) Are absorbed throughout the plant (B) Kill insects following external bodily contact (C) Are stomach poisons (D) Emit poisonous vapour

Last Answer : (A) Are absorbed throughout the plant

. Fumigant insecticides (A) Kill insects, when they eat it (B) Emit poisonous vapour (C) Are absorbed throughout the plant (D) None of these

Description : . Fumigant insecticides (A) Kill insects, when they eat it (B) Emit poisonous vapour (C) Are absorbed throughout the plant (D) None of these

Last Answer : (B) Emit poisonous vapour

Assertion (A): Conserving our soil resources is critical to human survival. Reason (R): Soil is home to many micro-organisms and contains minerals. Choose the correct code: (A) Both (A) and (R) are correct and (R) is the correct explanation of (A). (B) Both (A) and (R) are correct but (R) is not the correct explanation of (A). (C) (A) is true and (R) is false. (D) (A) is false and (R) is true.

Description : Assertion (A): Conserving our soil resources is critical to human survival. Reason (R): Soil is home to many micro-organisms and contains minerals. Choose the correct code: (A) Both (A) and (R) are correct and (R) is the ... (C) (A) is true and (R) is false. (D) (A) is false and (R) is true.

Last Answer : (A) Both (A) and (R) are correct and (R) is the correct explanation of (A).

Which of the following listed is not a feature of organic farming ? (1) The non-use of chemical fertilizers and pesticides (2) Soil is nurtured for furture use by maintaining micro-organisms (3) Use of synthetic fertilizers (4) Very less energy consumption

Description : Which of the following listed is not a feature of organic farming ? (1) The non-use of chemical fertilizers and pesticides (2) Soil is nurtured for furture use by maintaining micro-organisms (3) Use of synthetic fertilizers (4) Very less energy consumption

Last Answer : Use of synthetic fertilizers

Denatured alcohol 1. Is an impure form of ethanol 2. Is unfit for drinking as it contains poisonous substances 3. Contains impurities 4. Is very unsafe to consume The correct answers are: (a) 1, 2 and 4 (b) 1, 2, 3 and 4 (c) 2, 3 and 4 (d) 1, 2 and 3

Description : Denatured alcohol 1. Is an impure form of ethanol 2. Is unfit for drinking as it contains poisonous substances 3. Contains impurities 4. Is very unsafe to consume The correct answers are: (a) 1, 2 and 4 (b) 1, 2, 3 and 4 (c) 2, 3 and 4 (d) 1, 2 and 3

Last Answer : Ans:(b)

Of the hemolytic groups of streptococci, _____ is the most dangerous because the organisms completely destroy red blood cells. a. alpha hemolytic group b. the beta hemolytic group c. the gamma hemolytic d. strep viridins group

Description : Of the hemolytic groups of streptococci, _____ is the most dangerous because the organisms completely destroy red blood cells. a. alpha hemolytic group b. the beta hemolytic group c. the gamma hemolytic d. strep viridins group

Last Answer : b. the beta hemolytic group

Time in minutes at any defined temperature to destroy 90% of organisms is A D Value B Z value C F Value D Q10 value

Description : Time in minutes at any defined temperature to destroy 90% of organisms is A D Value B Z value C F Value D Q10 value

Last Answer : A D Value

Given below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels? 10 50 500 1 SC PC PP(a) Level PC is “insects” and level SC is “small insectivorous birds”. (b) Level PP is “phytoplanktons” in sea and “whale” on top level TC. (c) Level one PP is “pipal trees” and the level SC is “sheep”. (d) Level PC is “rats” and level SC is “cats”.

Description : Given below is an imaginary pyramid of numbers. What could be one of the possibilities about certain organisms at some of the different levels? 10 50 500 1 SC PC PP (a) Level PC is insects and level SC is ... trees and the level SC is sheep . (d) Level PC is rats and level SC is cats .

Last Answer : (a) Level PC is “insects” and level SC is “small insectivorous birds”

$ Louis Pasteur discovered that fermentation is brought about by micro-organisms ! Parasitic becteria bring about fermentation.

Description : $ Louis Pasteur discovered that fermentation is brought about by micro-organisms ! Parasitic becteria bring about fermentation.

Last Answer : $ Louis Pasteur discovered that fermentation is brought about by micro-organisms ! Parasitic becteria bring about ... D. If both As and R are wrong.

What are the three three examples of food which is produced using micro organisms. What types of micro organisms are used in each case?

Description : What are the three three examples of food which is produced using micro organisms. What types of micro organisms are used in each case?

Last Answer : What is the answer ?

What are the three examples of food which is produced using micro organisms. What types of micro organisms are used in each case?

Description : What are the three examples of food which is produced using micro organisms. What types of micro organisms are used in each case?

Last Answer : What is the answer ?

The phosphate solubilizer species of micro organisms is

Description : The phosphate solubilizer species of micro organisms is

Last Answer : Ans. Pseudomonas

The temperature for pasteurization of milk is selected so as to (a) Kill the micro-organisms (b) Kill all bacteria (c) Store it for long time without coagulation (d) Kill the micro organisms and other harmful bacteria

Description : The temperature for pasteurization of milk is selected so as to (a) Kill the micro-organisms (b) Kill all bacteria (c) Store it for long time without coagulation (d) Kill the micro organisms and other harmful bacteria

Last Answer : Ans:(c)

The statement that is NOT correct is (a) The breaking of complex and big molecules into simpler and smaller molecules by micro-organisms is called fermentation. (b) ****** contains high percentage of methanol. (c) Root **** does not contain alcohol. (d) Alcoholic fermentation involves the conversion of sugars into alcohol by the use of micro-organisms.

Description : The statement that is NOT correct is (a) The breaking of complex and big molecules into simpler and smaller molecules by micro-organisms is called fermentation. (b) Whisky contains high ... d) Alcoholic fermentation involves the conversion of sugars into alcohol by the use of micro-organisms.

Last Answer : Ans:(b)

Serpasil is (a) a tranquilizer (b) an antibiotic (c) produced by micro-organisms (d) a mordant dye

Description : Serpasil is (a) a tranquilizer (b) an antibiotic (c) produced by micro-organisms (d) a mordant dye

Last Answer : Ans:(a)

An antibiotic is - (1) achemical synthesized by a human cell against a microorganism (2) a chemical synthesised by amicro-organism against another micro-organisms (3) a substance produced by blood cells against bacteria (4) a substance produced by blood cells against infection.

Description : An antibiotic is - (1) achemical synthesized by a human cell against a microorganism (2) a chemical synthesised by amicro-organism against another micro-organisms (3) a substance produced by blood cells against bacteria (4) a substance produced by blood cells against infection.

Last Answer : (2) a chemical synthesised by amicro-organism against another microorganisms Explanation: An antibacterial is an agent that inhibits bacterial growth or kills bacteria. The term is often used ... by a microorganism that is antagonistic to the growth of other microorganisms in high dilution.

Fat present below the skin surface in our body acts as a barrier against – (1) loss of heat from the body (2) loss of essential body fluids (3) loss of salt from the body (4) entry of harmful micro-organisms from the environment

Description : Fat present below the skin surface in our body acts as a barrier against – (1) loss of heat from the body (2) loss of essential body fluids (3) loss of salt from the body (4) entry of harmful micro-organisms from the environment

Last Answer : (1) loss of heat from the body Explanation: A layer of body fat acts as an insulator and traps heat. The subcutis is the deepest layer of skin. The subcutis, consisting of a network of collagen ... , helps conserve the body's heat and protects the body from injury by acting as a "shock absorber.

Two richest known sources of edible protein are – (1) Meat and eggs (2) Some algae and other micro-organisms (3) Soyabean and groundnut (4) Milk and leafy vegetables

Description : Two richest known sources of edible protein are – (1) Meat and eggs (2) Some algae and other micro-organisms (3) Soyabean and groundnut (4) Milk and leafy vegetables

Last Answer : (1) Meat and eggs Explanation: Meat, fish and eggs are the richest sources of protein. An ounce of meat or fish has approximately 7 grams of protein. A large ead contains 6 grams protein.

Enzymes are – (1) Micro organisms (2) Proteins (3) Inorganic compounds (4) Moulds

Description : Enzymes are – (1) Micro organisms (2) Proteins (3) Inorganic compounds (4) Moulds

Last Answer : (2) Proteins Explanation: Enzymes are proteins that act as a catalyst, lowering the activation energy of a reaction, therefore dramatically increasing the rate of the reaction. Like all ... of amino acids that fold to produce a three-dimensional product which determines their specific activities.

Of all micro-organisms, the most adaptable and versatile are – (1) Viruses (2) Bacteria (3) Algae (4) Fungi

Description : Of all micro-organisms, the most adaptable and versatile are – (1) Viruses (2) Bacteria (3) Algae (4) Fungi

Last Answer : (1) Viruses Explanation: The viruses are adaptable and versatile with many variations worldwide and they reproduce within the cells of the immune system of infected people. ... versatility an individual has developed to respond to changing interpersonal situations and environmental requirements.

The stability of a pond ecosystem depends on - (1) micro-organisms and fishes (2) micro-organisms and zoo planktons (3) fishes and reptiles (4) producers and consumers

Description : The stability of a pond ecosystem depends on - (1) micro-organisms and fishes (2) micro-organisms and zoo planktons (3) fishes and reptiles (4) producers and consumers

Last Answer : (4) producers and consumers

Name two diseases caused by following groups of micro-organisms. a) Bacteria b) Viruses c) Protozoa d) Fungi

Description : Name two diseases caused by following groups of micro-organisms. a) Bacteria b) Viruses c) Protozoa d) Fungi

Last Answer : Answers: a) Tuberculosis, Typhoid, Cholera b) Poliomyelitis, Influenza c) Sleeping sickness, Amoebic dysentery d) Ringworm, Actinomycosis

The chemical decomposition produced by micro-organisms on certain organic matter is

Description : The chemical decomposition produced by micro-organisms on certain organic matter is

Last Answer : called fermentation.

What are micro organisms?

Description : What are micro organisms?

Last Answer : Very minute living organism not seen without the aid of microscope are called "microorganisms". Pathogenic (disease causing) microorganisms are viruses, many bacteria, certain fungi and some protozoan.

Which groups of organisms are included in the micro organisms?

Description : Which groups of organisms are included in the micro organisms?

Last Answer : Micro organisms include viruses, bacteria, cyanobacteria, protozoa, some algae and some fungi.  

Biological oxidation ponds remove organic matters present in the polluted water by (A) Using the activities of bacteria and other micro organisms (B) Aerobic oxidation (C) Both (A) & (B) (D) Neither (A) nor (B)

Description : Biological oxidation ponds remove organic matters present in the polluted water by (A) Using the activities of bacteria and other micro organisms (B) Aerobic oxidation (C) Both (A) & (B) (D) Neither (A) nor (B)

Last Answer : (C) Both (A) & (B)

Lagoons used for purification of polluted water (A) Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds (B) Use micro-organisms/bacteria in presence of dissolved oxygen (C) Gives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended solid < 1 mg/litre and BOD = 3.8 mg/litre (D) All (A), (B) & (C)

Description : Lagoons used for purification of polluted water (A) Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds (B) Use micro-organisms/bacteria in presence of dissolved oxygen (C) Gives an ... 1 mg/litre and BOD = 3.8 mg/litre (D) All (A), (B) & (C)

Last Answer : (D) All (A), (B) & (C)

Growth of __________ is promoted by the presence of manganese in water. (A) Files (B) Algae (C) Micro-organisms (D) Mosquitoes

Description : Growth of __________ is promoted by the presence of manganese in water. (A) Files (B) Algae (C) Micro-organisms (D) Mosquitoes

Last Answer : (C) Micro-organisms

Pasteurisation of milk means (A) Removal of fatty and albuminous substance from it (B) Killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics (C) Inhibiting the growth of micro-organisms without killing them (D) None of these

Description : Pasteurisation of milk means (A) Removal of fatty and albuminous substance from it (B) Killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics (C) Inhibiting the growth of micro-organisms without killing them (D) None of these

Last Answer : (B) Killing of organisms present in it by heating it at controlled temperature without changing its natural characteristics

Eukaryotic micro organisms include A- Protozoa B- .fungi C- Algae D- all of these

Description : Eukaryotic micro organisms include A- Protozoa B- .fungi C- Algae D- all of these

Last Answer : all of these

hy is a food web more realistic way of portraying an ecosystem than a food chain? a) Because it shows the relation of organisms with each other in a habitat b) Because food chains use only a small sampling of organisms c) Because it doesn‘t shows the relation of organisms with each other in a habitat d) Because it compares the number of consumers to the number of micro-organisms.

Description : Why is a food web more realistic way of portraying an ecosystem than a food chain? a) Because it shows the relation of organisms with each other in a habitat b) Because food chains use only a ... other in a habitat d) Because it compares the number of consumers to the number of micro-organisms.

Last Answer : Because it shows the relation of organisms with each other in a habitat 

The group of micro-organisms involved in production of methane from acetic acid (or acetate) in anaerobic wastewater treatment process is : (a) Methodnotrix and Methanobacterium (b) Methanobacterium and Methanosarcina (c) Methanosarcina and Methanospirillum (d) Methanothrix and Methanosarcina

Description : The group of micro-organisms involved in production of methane from acetic acid (or acetate) in anaerobic wastewater treatment process is : (a) Methodnotrix and Methanobacterium (b) Methanobacterium and Methanosarcina (c) Methanosarcina and Methanospirillum (d) Methanothrix and Methanosarcina

Last Answer : (d) Methanothrix and Methanosarcina

Which micro-organisms in periapical lesion would you find microscopically: A. Aerobes B. Aerobes to mainly anaerobes

Description : Which micro-organisms in periapical lesion would you find microscopically: A. Aerobes B. Aerobes to mainly anaerobes

Last Answer : B. Aerobes to mainly anaerobes

The following strategy will promote rather than curb emergence of antibiotic resistant micro-organisms: A. Whenever possible use broad spectrum antibiotics B. Prefer a narrow spectrum antibiotic to a broad spectrum one if both are equally effective C. Prefer short and intensive courses of antibiotics D. Use antibiotic combinations for prolonged therapy

Description : The following strategy will promote rather than curb emergence of antibiotic resistant micro-organisms: A. Whenever possible use broad spectrum antibiotics B. Prefer a narrow spectrum ... Prefer short and intensive courses of antibiotics D. Use antibiotic combinations for prolonged therapy

Last Answer : A. Whenever possible use broad spectrum antibiotics

“Three million year-old micro-organisms have been brought back to life.”

Description : “Three million year-old micro-organisms have been brought back to life.” 

Last Answer : A bacterium that sat dormant in a frozen pond in Alaska for 32,000 years has been revived by NASA scientists. Once scientists thawed the ice, the previously undiscovered bacteria started swimming ... life elsewhere particularly as frozen lakes have been found just beneath the surface of Mars. 

The waste management technique that involves the use of micro-organisms to remove or neutralize pollutants from contaminated site is called (1) Bio sensor (2) Bio magnification (3) Bio remediation (4) Bio concentration

Description : The waste management technique that involves the use of micro-organisms to remove or neutralize pollutants from contaminated site is called (1) Bio sensor (2) Bio magnification (3) Bio remediation (4) Bio concentration

Last Answer : Bio remediation

Nutrients are recycled in the atmosphere with the help of certain micro-organisms referred to as (1) producers (2) consumers (3) decomposers (4) None of these

Description : Nutrients are recycled in the atmosphere with the help of certain micro-organisms referred to as (1) producers (2) consumers (3) decomposers (4) None of these

Last Answer : decomposers

Fat present below the skin surface in our body acts as a barrier against (1) loss of heat from the body (2) loss of essential body fluids (3) loss of salt from the body (4) entry of harmful micro-organisms from the environment

Description : Fat present below the skin surface in our body acts as a barrier against (1) loss of heat from the body (2) loss of essential body fluids (3) loss of salt from the body (4) entry of harmful micro-organisms from the environment

Last Answer : loss of heat from the body

Enzymes are : (1) Micro organisms (2) Proteins (3) Inorganic compounds (4) Moulds

Description : Enzymes are : (1) Micro organisms (2) Proteins (3) Inorganic compounds (4) Moulds

Last Answer : Proteins

Of all micro-organisms, the most adaptable and versatile are (1) Viruses (2) Bacteria (3) Algae (4) Fungi

Description : Of all micro-organisms, the most adaptable and versatile are (1) Viruses (2) Bacteria (3) Algae (4) Fungi

Last Answer : Viruses

An antibiotic is (1) a chemical synthesized by a human cell against a microorganism (2) a chemical synthesised by a micro-organism against another micro-organisms (3) a substance produced by blood cells against bacteria (4) a substance produced by blood cells against infection.

Description : An antibiotic is (1) a chemical synthesized by a human cell against a microorganism (2) a chemical synthesised by a micro-organism against another micro-organisms (3) a substance produced by blood cells against bacteria (4) a substance produced by blood cells against infection.

Last Answer : a chemical synthesised by a micro-organism against another micro-organisms

Two richest known sources of edible protein are (1) meat and eggs (2) milk and vegetables (3) soyabean and groundnut (4) some type of algae and other micro-organisms

Description : Two richest known sources of edible protein are (1) meat and eggs (2) milk and vegetables (3) soyabean and groundnut (4) some type of algae and other micro-organisms

Last Answer : soyabean and groundnut

$ Life on earth originated by interaction of the various chemical substances in the broth of the sea. ! The first organisms were, pherhaps the chemoau

Description : $ Life on earth originated by interaction of the various chemical substances in the broth of the sea. ! The first organisms were, pherhaps the chemoau

Last Answer : $ Life on earth originated by interaction of the various chemical substances in the broth of the sea. ! The ... wrong D. If both As and R are wrong.

The Correct Statements with reference to single called organisms are (i) Complex substances are not broken down in to simpler substances. (ii) Simple diffusion is sufficient to meet the requirement of exchange of gases. (iii) Specialized tissues perform different functions in the organism. (iv) Entire surface of the organism is in contact with the environment for taking in food. (a) (i) and (iii) (b) (ii) and (iii) (c) (ii) and (iv) (d) (i) and (iv)

Description : The Correct Statements with reference to single called organisms are (i) Complex substances are not broken down in to simpler substances. (ii) Simple diffusion is sufficient to meet the requirement of exchange of gases. (iii) Specialized ... b) (ii) and (iii) (c) (ii) and (iv) (d) (i) and (iv)

Last Answer : Answer: (c)

The term antibiotic was coined by _________to refer to antimicrobial substances naturally derived from _______. a. Waksman; bacteria and fungi b. Domagk; other living organisms c. Fleming; fungi and bacteria d. Ehrlich; bacteria

Description : The term antibiotic was coined by _________to refer to antimicrobial substances naturally derived from _______. a. Waksman; bacteria and fungi b. Domagk; other living organisms c. Fleming; fungi and bacteria d. Ehrlich; bacteria

Last Answer : c. Fleming; fungi and bacteria

Treatment of the hazardous substances in the environment with the help of living organisms is called as a. Bioremediation b. Waste management c. Waste control d. Biodegradation

Description : Treatment of the hazardous substances in the environment with the help of living organisms is called as a. Bioremediation b. Waste management c. Waste control d. Biodegradation

Last Answer : a. Bioremediation