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Dear students, prepare for biology class 10th chapter 7 long questions. These important long questions are carefully added to get you best preparation for your 10th class biology ch. 7 exams.
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Question: 1
Describe levels of ecological organization.
Answer: 1
1-39
Question: 2
Write a note on components of an ecosystem.
Answer: 2
2-39
COMPONENTS OF ECOSYSTEM Ecosystem: The self-sufficient unit of an environment that is formed as a result of interactions between its biotic community and the abiotic components is known as an ecosystem. An ecosystem comprises of two basic parts: 1. Abiotic components 2. Biotic components 1. Ahiotic Components: Definition: The non-living factors present in ecosystem are called abiotic components. Examples: The important non-living factors are: • Light • Air • Water • Soil • Basic elements and compOunds 2. Biotic Components: Definition: All the living parts (organisms) of the ecosystem are called as biotic components. Classification: Biotic components are further classified as: (i) Producers (ii) Consumers (iii) Decomposers (i) Producers: The producers are the autotrophs present in an ecosystem. These organisms are able to synthesize complex organic compounds (food) from inorganic raw materials. Producers form the basis of any ecosystem. Examples: Producers include: • Plants • Algae • Photosynthetic bacteria Terrestrial Ecosystem: In terrestrial ecosystems, plants are the main producers. Aquatic Ecosystem: In aquatic ecosystems, the main producers are the floating photosynthetic organisms (mainly algae) called phytoplankton and shallow water rooted plants. (ii) Consumers: The consumers are heterotrophs. They cannot synthesize their food and so depend upon producers for food. Examples: Consumers include: • All animals • Fungi • Protozoans • Many of the bacteria Classification of Animals: The animals are the major consumers of ecosystems. They are further classified as: Herbivores (Primary Consumers): The animals that feed on plants are called herbivores. The herbivores are the primary consumers. They feed directly on plants or products of plants. For example: • Cattle • Deer • Rabbit • Grasshopper Primary Carnivores: Primary carnivores (secondary consumers) feed on herbivores. For example: • Fox • Frog • Predatory birds • Many fishes • Snakes Secondary Carnivores: Secondary carnivores (tertiary consumers) feed on primary carnivores. For example: • Wolf • Owl Tertiary Carnivores: Tertiary carnivores feed on secondary carnivores. For example: • Lion • Tiger (iii) Decomposers: Decomposers or reducers break down the complex organic compounds of dead matter (of plants and animals) into simple compounds. They secrete digestive enzymes into dead and decaying plant and animal remains to digest the organic material. After digestion, decomposers absorb the products for their own use. The remaining substances are added to environment. Examples: • Bacteria • Fungi
Question: 3
Describe flow of energy in an ecosystem.
Answer: 3
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Question: 4
Describe flow of material in ecosystem.
Answer: 4
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Question: 5
Write a note on ecological pyramids.
Answer: 5
5-39
Question: 6
Write a note on carbon cycle.
Answer: 6
6-39
Question: 7
Write a note on compitition.
Answer: 7
7-39
Question: 8
Write a note on dengue fever.
Answer: 8
8-39
DENGUE FEVER Causative Organism: Dengue fever is a viral infection transmitted through a mosquito Aedes aegypti. Major Health Problem: It has become a major health problem in tropical and sub-tropical countries, including Pakistan. Viral Attack and Immunity: There are four types of dengue virus. Recovery from infection by one provides lifelong immunity against that virus but provides no protection against infection by the other three viruses. Incidence: According to the World Health Organization, there are 50 million dengue infections worldwide everyyear. Spread of Disease: The female Aedes mosquito gets the virus when it bites an infected person. When an infected mosquito bites another person, viruses enter his/her blood and attack white blood cells. Inside WBCs, viruses reproduce and destroy them. Symptoms: In severe cases, the virus affects liver and bone marrow. As a result there is a decrease in the production of blood platelets and patient suffers from bleeding. Other symptoms of dengue include: • High fever • Severe headache • Pain behind the eyes • Muscle and joint pains • Rash Complications: Sometimes, dengue fever converts into: Dengue Hemorrhagic Fever (DHF): DHF results in: • Bleeding • Low levels of blood platelets • Blood plasma leakage Dengue Shock Syndrome (DSS): In DSS the blood pressure falls dangerously low. Prevention: Tha•: is co vaccine for dengue fever. Treatment: There is no treatment of dengue fever. Control: At present, the only method of controlling dengue virus transmission is to check the spread of Aedes mosquitoes. Breeding of Aedes aegypti: Aedes aegypti breeds primarily in the: • Containers used for water storage • Discarded plastic i.ontainers • Used automobile tyres • Items that collect rain water Control over Mosquitoes: The mosquitoes can be controlled through: • Proper solid waste disposal • Improved water storage Practices Use of Predators: Small fish and crustaceans have also been used for killing the larvae of the mosquito. Use of Insecticides: Insecticide sprays have not proved efficient in killing the mosquitoes, because spray does not penetrate all habitats of adult mosquitoes.
Question: 9
Describe the plans for the conservation of nature.
Answer: 9
9-39
PLANS FOR THE CONSERVATION OF NATURE The following are the prcjects and plans of our government for the conservation of resources. National Conservation Strategy: In 1992, Pakistan developed the National Conservation strategy. The main *tams of the strategy are conservation of natural resources and improved efficiency in the use of resources. It also covers the policies for promoting• efficiency and conservation of energy resources. National Drinking Water and Sanitation Policy: The Federal Ministry of Environment has launched the National Drinking Water and Sanitation Policy. It focuses on the provision of clean drinking water to entire population and the conservation of water resources. Water purification plants are being installed all over the country. Mass Awareness for Water Conservation and Management: In 2006, the UNDP launched the project "Mass Awareness for Water Conservation and Management". The objective of the project was to launch a comprehensive awareness campaign for the conservation and management of water resources in Pakistan. Role of SCOPE: The organization SCOPE (Society for Conservation and Protection of Environment) works with government for mass awareness and research for the conservation of natural resources in Pakistan. Role of World Wide Fund for Nature: The WWF (old name is World Wildlife Fund but now it is called World Wide Fund for Nature) is working on many projects related to the conservation of nature. The following are some important programmes of WWF-Pakistan in collaboration with the govennment of Pakistan: • Improving sub-watershed management and environmental awareness around Ayubia National Park • Plantation of the trees of Jatropha and Mangroves at District Thatta, Sindh • District-wise forest cover assessment of Pakistan • Saving Wetlands Sky High Programme (for the conservation and management high altitude wetlands) • Indus Basin Water Security Project (to protect the water-flow needed for the maintenance of river ecosystem and for the benefit of nearby areas) • • Regional Climate Risk Reduction in Himalayas
Question: 10
Explain alcoholic fermentation and lactic acid fermentation?
Answer: 10
10-39

The fermentation is carried out many types of great of yeast such as saccharomyces cerevisiae this process is quite important and is used to produce bread beer wine and distilled spirits in this process carbon dioxide is removed from phruvic acid the product acetaledehyde is then reduced to ethanol the carbon dioxide prodeuced during this fermentation cause the rise of the bread

Lactic acid fermentation:

In this process phruvic acid is reduced to lactic acid it is carried out by many bacteria e.g streptococius and many lactobacillus species it is quite important in dairy industry where it is used for saiving milk and also for production of various types of cheese.

Question: 11
Write down any four achievement of genetic engineering?
Answer: 11
11-39

Various achiement of genetic engineering are as follow. Human insulin gene was transferred into bacteria the genetically modified bacteria become able to synthesize insulin .Diabetics are now receiving this insulin this type of genetic engineering for the production of insulin are shown in figure.In 1977 on E.cat bacterium was created that was capable of synthesizing the human growth harmone the harmone thymosin which may parse effective against brain and lungs cancer has been produced by genetically modified micro organisms .

Beta Endorphin:

A pain killer produced by the brain has also been produced by genetic engineering techniques genetic engineering produced a safe vaccine against foot and mouth diseases similarly many vaccines have been produced against human diseases such as hepatits B.

Question: 12
<div><br></div><div><br></div><div>Differentiate between medicinal and addictive drugs?</div>
Answer: 12
12-39

Various diseases have been made easier to treat in recent year by the production of medicinal drugs are abstained from the following source.

Addictive drugs:

Some drugs often make person dependent on them or addicate these may be called as addictive drug by using such drugs the person body becomes familiar to it, and the user cannot function well without it in this chapter we will learn about the functions of pharma ceutical drugs and the damages of the addictive drugs .

Question: 13
Explain four products obtained by suing fermentation?
Answer: 13
13-39

The fermentation maximum growth of on organisms is obtained for the production of desired products of commercial value traditionally only food and beverage products were produced by using fermentation now many other products industrial chemical are also being produced.

Fermented food:

Fermentation aften make the food more nutritions more digestible and tastier it also tends to preserve the food lowering the need for refrigeration the following groups are reduced in the fermented foods.

Careal products:

Bread is the commonest type of fermented careal products wheat dough is fermented by S, cerevisiae along with some lactic acid bacteria.

Dairy Products:

Cheese and yougurt are important fermentation products cheese is c a milk protein is coagulated this happens when the acid produced by lactic acid bacteria reacts with milk protein Yougurt is made from milk by different lactic acid bacteria.

Fruits and vegetable products:

Fermentation is usually used along with salt and acid to preserve pickle fruits and vegetables.

Beverage Products:

Beer is produced from cereal grains which have been malted dried and ground into fine powder fermentation of the powder is done by yeast this process breaks the glucose present in powder into pyruvic acid and then into ethanol grapes can be directly fermented by yeasts to wine.

Industrial products:

The following are the important industrial products produced through the process of fermentation.

Products:

Formic acid/ Ethamol

Microorganisms used:

Aspergillues/ Saccharomyces

Some uses:

Used in textile dyeing leather treatment rubber /used as solved used in the production of vinegar and beverages.

Question: 14
What is meant by single cell protein?what steps world has taken in this regard?
Answer: 14
14-39

In genetic engineering we have studied about the transformation of microorganisms by the introduction of genes of beneficial protein insulin single cell protein refers to protein content extracted pure or mixed culture of algae yeasts fungi or bacteria for the production of single cell protein the microorganisms are grown in fermenteos these micro organisms utilize a variety of substrate like agriculture wastes industrial wastes natural gas like methane etc. Microorganisms graw very vigorously and produced a high field of protein we know that due to overpopulation the world is facing the problem of food shortage in future the conventional agricultural methods might not be able to produce a sufficient supply of food for a better managements of food shortage problem the use of microbes as the producers of single cell protein has been successful l on experimental basis this technique was introduced by prof scrimshaw of massachusetts institute of technology scientist and food technologsits all scientists recognize the significance of the production of single cell protein the micro organisms grew very vigorously and produce a high yield It has been calculated that 50 kilogram of yeast produces about 250 tones of protein with in 24 hour. Algae grown in pens produce 20 tons of protein per can acre/year this yield of protein is 10-15 time higher then say beans and 20-50 times higher than can when single cell protein are produced by using yeasts the products also contains high vitamin content more ever the production of single cell proteins in independent of seasonal variations.

Question: 15
<div>What is meant by single cell protein?what steps world has taken in this regard?</div><div><br></div>
Answer: 15
15-39

In genetic engineering we have studied about the transformation of microorganisms by the introduction of genes of beneficial protein insulin single cell protein refers to protein content extracted pure or mixed culture of algae yeasts fungi or bacteria for the production of single cell protein the microorganisms are grown in fermenteos these micro organisms utilize a variety of substrate like agriculture wastes industrial wastes natural gas like methane etc. Microorganisms graw very vigorously and produced a high field of protein we know that due to overpopulation the world is facing the problem of food shortage in future the conventional agricultural methods might not be able to produce a sufficient supply of food for a better managements of food shortage problem the use of microbes as the producers of single cell protein has been successful l on experimental basis this technique was introduced by prof scrimshaw of massachusetts institute of technology scientist and food technologsits all scientists recognize the significance of the production of single cell protein the micro organisms grew very vigorously and produce a high yield It has been calculated that 50 kilogram of yeast produces about 250 tones of protein with in 24 hour. Algae grown in pens produce 20 tons of protein per can relyear this yield of protein is 10-15 time higher then say beans and 20-50 times higher than can when single cell protein are produced by using yeasts the products also contains high vitamin content more ever the production of single cell proteins in independent of seasonal variations.

Question: 16
<div><br></div><div>Describe drug addition and associated problem?</div>
Answer: 16
16-39

Drug abusers go through withdrawal of social content or communication many studies by the expents of social science prove that there axists a close relationship between drug addcition and crime the compulsion for narcotic drug makes every drug addict a law violator and a criminal Mere possession of a narcotic drug is a violation of the law. Thus every drug addict is subject to arrest by the police.

Most narcotic addicts get involved in various types of crime e.g robbery shoplifting burglary embezzlement etc drug addict may commit violent crimes since so many becomes psychic patients the addicts are very weak in their social behavior they face social stigma i.e the society dislikes them because of their unpredictable behaviours.

Question: 17
<p class="MsoNormal">What is drug give one example of synthetic drugs?</p>
Answer: 17
17-39

Any substance that when absorbed into the body at a living organism alters normal body function is known drug aspirin.

Question: 18
<p class="MsoNormal">Difference between pharmacy and pharmacology?</p>
Answer: 18
18-39

The study of drug of drug composition and properties and medical and application.

Pharmacy;

Pharmacy is the science and technique of preparing and dispensing drugs.

Question: 19
<p class="MsoNormal">Write the name of two drug which are obtained ?</p>
Answer: 19
19-39

Several common drugs are produced from minerals the mineral iodine is used in making tincture of iodine a liquid that helps prevent infection when applied to cuts and bruises the powder form of silver nitrate is applied on wands be stop bleeding and prevent infection.

Question: 20
<p class="MsoNormal">Define fermentation and fermenter?</p>
Answer: 20
20-39

A device that provides aptimum environment in which organisms can graw to produce biomass and to perform the product.

Fermentation:

The process in which there is incomplete oxidation reduction of the organic substrate glucose.

Question: 21
<p class="MsoNormal">Difference between narcotics and hallucinogens?</p>
Answer: 21
21-39

Drug that causes changes in perception thought emation and consciousness.

Narcotics:

Strong painkiller drugs also used as addictive drugs commonly abused narcotics include herion morphine methadone etc.

Question: 22
<p class="MsoNormal">What is lactic acid fermentation?</p>
Answer: 22
22-39

In this process pyruvic acid is reduced to lactic acid it is carried out by many bacteria strepto occurs and many lactobacillus species.

Question: 23
<p class="MsoNormal">Define expression of the gene?</p>
Answer: 23
23-39

The GMO contains the gene of interest and manufactures the desired product which is isolated from culture medium

Question: 24
<p class="MsoNormal">Write short answer to any five clusion what is herion?</p>
Answer: 24
24-39

A commonly abused narcotic derived from morphine affects the central nervous system and cause drousiness disorientation, hypotension.

Question: 25
<p class="MsoNormal">Difference between medical drug and addictive drug?</p>
Answer: 25
25-39

Any substance chemical medical diagnose cure treatment or prevention of disease.

Addictive drug:

Some drug often make person depend on them or addictive these may be called as addictive drugs.

Question: 26
<p class="MsoNormal">What is genetic donar?</p>
Answer: 26
26-39

In the first step the genetic engineer identifies the gene of interest to the host in a donar organisms.

Question: 27
<p class="MsoNormal">Write any two objectives of genetic engineering?</p>
Answer: 27
27-39

Production of particulars RNA and protein mlolecules treatment of genetic defect in higher organisms .

Question: 28
<p class="MsoNormal">Define vactor?</p>
Answer: 28
28-39

The DNA or bacteriophage etc that transfers the isolated gene of interest to the hot cell.

Question: 29
<p class="MsoNormal">Difference b/w vaccine and vaccination?</p>
Answer: 29
29-39

The material used to produced immunity to a disease by stimulating the production of anti bodies.

Question: 30
<p class="MsoNormal">What is the common method of adminstring vaccines?</p>
Answer: 30
30-39

Vaccines are used to develop immunity against ural and bacterial infect vaccines against small pox unhaping caugh hepatitis B.

Question: 31
<p class="MsoNormal">Write two effect of marijunna?</p>
Answer: 31
31-39

Marijunna is a hallucinogens high doses increase heart rate it is also effects the production of sperms in men and also weaknes the short term memory.

Question: 32
<p class="MsoNormal">What is single cell proteins?</p>
Answer: 32
32-39

The praticn content extracted from pure or mixed cultures of algae yeasts fungi or bacteria the microorganisms are grown in fermenters where they produce a high yield of proteins.

Question: 33
<p class="MsoNormal">From morphine and digitals is obtained?</p>
Answer: 33
33-39

Morphine acts directly on control nervous system to relieve pain morphine has a high potential for addiction.

Question: 34
<p class="MsoNormal">What is thymosin?</p>
Answer: 34
34-39

The harmone thymosin which may prove effective against brain and lungs cancer has been produced by genetically modified microorganisms.

Question: 35
<p class="MsoNormal">What is cardiotonic?</p>
Answer: 35
35-39

Medicines for giving strength to heart muscles.

Question: 36
<p class="MsoNormal">What is continuous fermentation?</p>
Answer: 36
36-39

The fermentation in which substrate is added to the fermenter continuously at a fixed rate.

Question: 37
<p class="MsoNormal">What do you know about sulfonalnide and tetracyclin?</p>
Answer: 37
37-39

Sulpha drugs synthetic antibiotics inhibit bacterial pratcin synthesis.

Question: 38
<p class="MsoNormal">What is recombinant DNA?</p>
Answer: 38
38-39

The vactor DNA and the attached gene of interest.

Question: 39
<p class="MsoNormal">What is tincture of iodine?</p>
Answer: 39
39-39

The mineral iodine is used in making tincture of iodine.