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1351.

b) Define reproduction. What are the two main types of reproduction

Answer»

Reproduction(orprocreationorbreeding) is thebiological processby which new individualorganisms– "offspring" – are produced from their "parents". Reproduction is a fundamental feature of all knownlife; each individual organism exists as the result of reproduction. There are two forms of reproduction:asexualandsexual.

In asexual reproduction, an organism can reproduce without the involvement of another organism. Asexual reproduction is not limited tosingle-celled organisms.

Sexual reproduction typically requires the sexual interaction of two specialized organisms, calledgametes, which contain half the number ofchromosomesof normal cells and are created bymeiosis, with typically a malefertilizinga female of the samespeciesto create a fertilizedzygote. This producesoffspringorganisms whose genetic characteristics are derived from those of the two parental organisms

1352.

Disease and Its Causes

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Infectious diseases are disorders caused by organisms — such as bacteria, viruses, fungi or parasites. They're normally harmless or even helpful, but under certain conditions, some organisms may cause disease. Some infectious diseases can be passed from person to person.

tq

1353.

Is sex education necessary in schools? Why?

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1354.

SECTION A - BIOLOGY0.1.Fill in the blanks :-diseases continues for many days and causesdiseases continues for a few days and causes noon bodywys and causes no long term effect onil mental and social well being and comfort

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chickenpox and puts rashes on body

1355.

15. Biosystematics aims at

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Ans :- The classification of organisms based on their evolutionary history and establishing their phylogeny on the totality of various parameters from all fields of studies.

1356.

What changes can you make in your habits to become more environmentriendly?itina resources with short-term aims?

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1357.

8. Waterpollution

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Water pollution is the contamination of water bodies likelakes, rivers, oceans, aquifers and groundwate

1358.

factors of air pollution

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Air pollutants like ozone, particulate matter, carbon monoxide, nitrogen oxide, sulfur dioxide, lead cause atmospheric pollution which regards to ozone depletion, GH effect, climate change and human health effects. If anyone say the main factors of air pollution beyond of industry, means of transportation, solid waste generation and urbanization.

1359.

6. Differentiate between Diffusion and osmosis?

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Diffusion is a spontaneous movement of particles from an area of high concentration to an area of low concentration. ...

Osmosis is the spontaneous net movement of water across a semipermeable membrane from a region of low solute concentration to a more concentrated solution, up a concentration gradient.

DIFFUSION refers to the movement of any chemical from one place to another. Diffusion is also the movement of molecules — solute or particles.

They move from a region in which they are in higher concentration to regions of lower concentration. A good example of diffusion is food colouring.

If you place a drop of red food colouring in a beaker of water eventually the entire beaker of water will have a red tint. The food colouring moved through the water until it was equally distributed throughout the beaker. Diffusion takes place along a concentration gradient. A concentration gradient exists until the diffused substance is evenly distributed.

The other everyday examples of diffusion:

Sugar will diffuse through tea until the entire cup of tea is sweet. We stir to speed up the process.The odour of food cooking diffuses through the kitchen. If you open the kitchen door it will spread through the next room.The movement of these molecules is said to be passive. No energy needs to be provided. The natural kinetic energy of the particles supplies the energy..

OSMOSIS exclusively refers to the movement of water across a membraneis a special example of diffusion. It is the diffusion of a substance through a semipermeable membrane from a more dilute solution to a more concentrated solution. This process is also passive since no external energy is needed.

A semipermeable membrane is a barrier that permits the passage of some substances but not others. Cell membranes are described as selectively permeable because not only do they allow the passage of water but also allow the passage of certain solutes (dissolved substances).

Some examples of osmosis:

Absorption of water by plant roots.Reabsorption of water by the proximal and distal convoluted tubules of the nephron.Reabsorption of tissue fluid into the venule ends of the blood capillaries.Absorption of water by the alimentary canal — stomach, small intestine and the colon.

1360.

6. 3.27 is(A) an integer(B) a rational mumber(C) a natural number(D) an irrational number3.7 ਹੈ(A) ਇੱਕ ਪੂਰਨ ਸੰਖਿਆ() ਇੱਕ ਪਰਿਮੇਯ ਸੰਖਿਆ(C) ਇੱਕ ਕੁਦਰਤੀ ਸੰਖਿਆ() ਇੰਕ ਅਪਰਿਯ ਸੰਪਿਆ17. If sum of roots and product of roots is 1. 1 of undmio equation, then it is{A - +1(B) * +2 +, Iਹੈ ਤਾਂ ਇਹ ਸਮੀਕਰਣ ਹੈ ।(D) + + 2 + 1ਜਹ ਦੇ ਘਾਗੀ ਸਮੀਕਰਣ ਦੇ ਮੂਲਾਂ ਦਾ ਜੰਡਵਲ ਅਡੇ ਹਵਨ(A) + - 2x +(B) * + 2x +() * + +148 Ifa, Bare the zerocs of the polynomial p(x) - 4x + 3x + 7, thenis equal toQ.B. Series 'AScanned by CamScannerਜੇਕਰ %, , ਬਹੁਪਦ (x) = ਜੀr + 3x +7, ਦੇ ਸਿਰੇ ਹਨ, ਤਾਂਕੀਖਰਾਬਰ ਹੋਵੇ ,49. The value of K for which the system of equationsX = =2.GA - 2y = 3has a unique solution, is(A) R = ਤੇ(B) K + 3(C) K #0(D) K. -ਹੋ॥

Answer»

ADAC is the right answer

D. BAD

1361.

Why are earthworms called a farmer's friend?

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Earthwormsareknown as farmers' bestfriendsbecause of the multitude of services they provide that improve soil health and consequently plant health.

Composting is a process where the biodegradable wastes are decomposed naturally and the nutrients are restored to the soil. Earth worms help in the process of decomposition by the process of vermicomposting. Since, they help to increase the productivity of the soil, we call them 'farmer's friends'.

decompose the particles makes fertility

decomposition leads to release of nutrients. helps in farming

Earthwormsare known asfarmers' bestfriendsbecause of the multitude of services they provide that improve soil health and consequently plant health. ... The soil, in addition to being the habitat for crops, also nurtures other organisms, some of which can cause devastating diseases to plants.

Earthwormsareknown as farmers' bestFriendsbecause of the multitude of services they provide that improve soil health and consequently plant health. The soil, in addition to being the habitat for crops, also nurtures other organisms, some of which can cause devastating diseases to plants.

because it helps to increase the fertility of soil

1362.

ga: =l 3 (Endocrine system)

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Endocrine glands release hormones into the bloodstream. This lets the hormones travel to cells in other parts of the body. The endocrine hormones help control mood, growth and development, the way our organs work, metabolism , and reproduction. The endocrine system regulates how much of each hormone is released.

1363.

How areearthwormssoils best friends

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Wormshelp to increase the amount of air and water that gets into thesoil. They break down organic matter, like leaves and grass into things that plants can use. When they eat, they leave behind castings that are a very valuable type of fertilizer.Earthwormsare like free farm help.

earth worms help in replenishing the soil

1364.

In human beings multiple genes are involved in the inheritance of

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traits

1365.

state mendels law of inheritance .

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Mendel's Law of inheritance:-

Mendel's Lawof Segregation states individuals possess two alleles and a parent passes only one allele to his/her offspring.

Mendel's Lawof Independent Assortment states theinheritanceof one pair of factors ( genes ) is independent of theinheritanceof the other pair.

1366.

3. Which soils have the highest cation exchange capacity?

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claley soils have the highest cation exchange capacity

1367.

discuss the role of menralo

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Just like vitamins,mineralshelpyour bodygrow, develop, and stayhealthy. Thebodyusesmineralsto perform many differentfunctions— from building strong bones to transmitting nerve impulses. Somemineralsare even used to make hormones or maintain a normal heartbeat

1368.

CONCEPTUAL UNDERSTAIODWhat is transport system ? How does this help to the organism?ilut lio w need sevęral items such as food grains

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Transport System:System helping in the transportation of various useful substances in the body of living organisms is known as transportation system or circulatory system.

It generally consists of a heart, blood vessels, blood plasma, blood, blood cells and the lymphatic system.

The circulatory system helps transport of oxygen to the cells for respiration, takes carbon dioxide from the cells and transports it to lungs, transports impure blood to kidneys for purification, transports excretory materials, transports various hormones, etc.

Transportation of all these substances is essential for sustaining the life of the living organism. In this way, the transportation system helps the living organisms by sustaining their life.

1369.

Wherever applicable.19) How is a key helpful in the identification and classification of an Organism.5x3-15

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1370.

what is life process es

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Alllivingthings performlife processes, which areprocessesthat the organism completes that are necessary to keep it alive and functioning well.

Theselife processesinclude nutrition, excretion, reproduction, movement, respiration, growth, and sensitivity.

1371.

why reproduction is not consider of life process?

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Reproduction is not necessary to maintain the life of an organism but it is very important to continue the generation of living organisms on earth.

thnx

reproduction is not considered as the life processes because it is not important that reproduction is done if the reproduction is done it led to the groth for the future generation

1372.

_____ is the highest peak of Andes mountain.

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Aconcagua is the highest peak of Andes mountain

1373.

If food pipe of human being is getting loose than what will happen? There is any treatment for this or not?

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tell me ans

tell the ans pls

1374.

92. The enlarged end of penis is covered by a loose foldof skin is called(a) Glans penis(6) Foreskin(c) Hymen(d) Urethral meatus

Answer»

please let me know if you send

b) foreskin is the correct answer.

option b is the right answer

b option is the right answer

option (b) is correct

(b) is right answer of this question. please like my answer

1375.

Acrosome reaction in sperm is triggered by(a) capacitation(b) release of lysin(c) influx of Ca++(d) release of fertilizin.(2008)

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option B

1376.

(2) Write a comparative note on usefulness, and harmfulness of technology

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Positives of Biotechnology

Biotechnology has modified plants to have their very own pest- resistant traits, which makes the use of harmful pesticides and insecticides less common on the farms.With the help of biotechnology, we have been able to produce better tasting fruits as well as vegetables.Biotechnology has also given us several diagnostic kits which make it easier for human beings to detect pest infestation in plants and animals. The best part is that these diagnostic kits are very accurate and hence growers get a chance to rightly predict the amount as well as time when they should be using pesticides and other methods for maximum plant growth and cultivation.Plants have become more resistant to viruses and other communicable pests.A number of human and animal diseases have found cure and prevention, all thanks to biotechnology. There are vaccines which help in preventing as well as lowering the impact of illnesses, which is otherwise very difficult to control.Plants and animals are able to yield better fruits and dairy products with the help of biotechnology.Highly reliable, consistent and rapid enzymes have been created with the help of biotechnology. These enzymes play a major role in food processing as well as prevention.

Negatives of BiotechnologyHigh cost of genetic engineering. Genetic engineering is a very vital part of biotechnology and the cost of transferring genes from one species to another is very expensive, which requires a huge amount of capital investment. The cost of producing genetically- modified plants and animals are sky- rocketing and the duration of return is also not predictable.Genetic engineering crosses boundaries of reproduction by crossing genes of species that are completely unrelated; hence giving rise to hazardous results as well as also increasing the risk of harming multiple species.When genetic material from certain viruses is used in the production of transgenic crops, there are chances that these virus genes will combine with crop genes to produce more destructive viruses. The consumption of such crops is hazardous to human health and can cause several life- threatening ailments. It can also result in cancer, often malignant as well.

1377.

7. Write 10 lines on the usefulness of microorganisms in our lives.

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1378.

Environmental consequences

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Environmental consequences related to corrosion refer to the destructive effects of corrosion's reaction with the environment. The severe consequences of the process of corrosion are a worldwide problem that requires a high degree of attention.

Environmental consequences of corrosion include:

Shutdowns

Wastage of valuable resources

Contamination or loss

Decreased efficiency

Higher expense

Compromised safety

Compromised technology

1379.

List anyfiveconsequencesofdrug

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1380.

who is Antony van leewenheuk

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Antonie Philips van Leeuwenhoek was a Dutch businessman, scientist, and one of the notable representatives of the Golden Age of Dutch science and technology.

Anton van Leeuwenhoek (1632 - 1723) was a Dutch tradesman and scientist, best known for his work on the development and improvement of the microscope and also for his subsequent contribution towards the study of microbiology.

Using handcrafted microscopes, Anton van Leeuwenhoek was the first person to observe and describe single celled organisms, which he originally referred to as animalcules (which we now refer to as microorganisms). He was also the first to record and observe muscle fibres, bacteria, spermatozoa and blood flow in capillaries (small blood vessels).

thanks

1381.

............. is a constellation that resembles a hunter.(A) Ursa major(C) Orion(B) Leo(D) Scorpius

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option c Orion constellationis also known as hunter constellation or the hunter. It is seen in the north sky during winter. Its Indian name is Mriga. This constellation also consists of seven stars and their arrangement resembles a hunting man.

thanks di 😇

1382.

hat are the different ways in which water gets contaminated

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1383.

legs is140. Then find the number of lions and peacocks in the zoo.Sanjay gets fixed monthly income. Every year there is a certain increment in his salary.After 4 years, his monthly salary was Rs. 4500 and after 10 years his monthly salarybecame 5400 rupees, then find his original salary and yearly increment.ACO mnand price of 5 chairs and 3 tahles is

Answer»

Answer: His monthly salary is 3900 rupees,

And, his yearly increment is 150 rupees.

Step-by-step explanation:

Let his fixed monthly salary is x rupees,

And, the increment per year is y rupees.

Since, after 4 years his monthly salary was 4500,

That is, x + 4y = 4500 ----(1)

And, after 10 years his monthly salary was 5400 rupees,

That is, x + 10y = 5400-----(2)

Equation (2) - Equation (1)

We get,

6 y = 900 ⇒ y = 150

By putting this value in equation (1),

x + 600 = 4500

⇒ x = 3900

Hence, his monthly salary is 3900 rupees,

And, his yearly increment is 150 rupee

ggiiUSMC isle idler Ismael Hansen handy

the monthly salary is 3900 rs

1384.

What are the different ways in which water gets contaminated?

Answer»
1385.

1.What are the different ways in which water gets contaminated ?

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water get contaminated through different ways such as:to wash clothes and utensils in some water bodiesto release wastage and chemicals in riverto use fertilizerto throw ash of dead organisms in water bodies

by washing cloth and utensils the water get contaminated

by washing our clothes and utensils and by throwing ash dead organism in sea water

1386.

iteless Nat is Cloud Computing?z Wh

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Cloud computing is the the use of various services, such as software development platforms, servers, storage and software, over the internet, often referred to as the "cloud."

1387.

5) Write any one economic importence of algae.6) What is Veration?7) Define digestion?

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7)Digestion is a form of catabolism that is often divided into two processes based on how food is broken down: mechanical and chemical digestion. The term mechanical digestion refers to the physical breakdown of large pieces of food into smaller pieces which can subsequently be accessed by digestive enzymes.

5)Theeconomic importance of algaeis very diverse. Some of thealgaeare used as food and fodder, in agriculture, industry, medicine, purification of water, aviation and as a source of petroleum and natural gas.

1388.

3)Which type of inflorescence shows an unlimited growth and why?

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When several flowers arise in a cluster on a common axis, the structure is referred to as aninflorescence. The common axis is the inflorescence axis which is also calledrachisorpeduncle. Several single flowers are attached to the inflorescence axis. In case of plants possessing underground rhizomes, the rachis or peduncle arises directly from the rhizome. Such a rachis is referred to asscape. In the case oflotus, the scape gives rise to a solitary flower. In plants likeonion, the scape gives rise to an inflorescence.

boring apps too late answer

1389.

ENGLISH VERSION26.The process by which a plant produce their own kind is called as

Answer»

Photosynthesis

Plants are called producers. This is because they produce their own food! They do this by using light energy from the Sun, carbon dioxide from the air and water from the soil to produce food - in the form ofglucose/sugar. The process is calledphotosynthesis.

the process by which a plant produce their own kind is called as reproduction

1390.

An aggregate fruit is one which developsfrom a. Multicarpellary syncarpous gynoeciumb. Multicarpellary apocarpousgynoeciumc. Complete inflorescenced. Multicarpellary superior ovary

Answer»

thanks. now i know that this app really works and how this app works? thanks for answering

1391.

What will you do to increase publicawareness about organ donation inyour area?

Answer»

We believe education has a vital role to play in addressing people’s concerns about organ donation. Our research has highlighted the important role young people can play in stimulating discussion and debate in the family. By creating this education pack we are giving young people the facts about organ donation. We hope that this will not only make them think about what they would want to do themselves but it will also start discussions with their own families and friends.

“We’re grateful to everyone who has shared their personal stories for this education pack and look forward to organ donation becoming part of every child’s education.”

1392.

Lt v meond bJ‘L g\‘d&‘u‘”‘/h(f\tc\)ru'/vs 7 vorife T<“a कैद. (ले. ,

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Biological magnification often refers to the process whereby certain substances such as pesticides or heavy metals move up the food chain, work their way into rivers or lakes, and are eaten by aquatic organisms such as fish, which in turn are eaten by large birds, animals or humans.

The production of new plants from a small piece of plant tissue or cells removed from the growing tips of a plant in a suitable growth medium is called tissue culture or culture solution. In this process the growth medium or culture solution is very important as, it is used for growing plant tissue because it contains various plant nutrients in the form of ‘jelly’ known as agar and plant hormones which are necessary for the growth of plant.

1393.

4. What are the advantages of sexual reproduction over asexual reproduction?5. What are the functons

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1. In sexual reproduction, more variations are produced. Thus, it ensures survival of species in a population.

2. The new formed individual has characteristics of both the parents.

3. Variations are more viable in sexual mode than in asexual one. This is because in asexual reproduction, DNA has to function inside the inherited cellular apparatus

1394.

what is cents

Answer»

cell is the smallest unit of our body . A cell is the smallest unit of life. Cells are often called the "building blocks of life". The study of cells is called cell biology or cellular biology. Cells consist of cytoplasm enclosed within a membrane, which contains many biomolecules such as proteins and nucleic acids.

Cell is the basic structural unit of life.

cell is the smallest unit of life

Cell is the smallest unit of our body

Cell is the basic structural unit of life

Cell is the basic unit of our life.

cell is the smallest unit of lufe

cell is a fundamental unit of structural and functional organisms

1395.

uld inhibitit Caused transformation and DNA is the hereditary materialDescribe the role of Microbes in sewage treatment plant.Ans: After the

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Aerobic and anaerobic respiration and fermentation play an importantroleinsewage treatment. Photosynthesis is generally not used in thesewageworks because it is a process that builds organic compounds from carbon dioxide, whereas the objective ofsewageworks is to break down organic compounds.

1396.

CLASs8person with myopia cannot seeb) dlistant ColouredObtectblack,tuo mivrors are kept

Answer»

myopia is short sight so he cannot see distant objects clearly but can see nearby objects clearlyso answer is b) distant

1397.

are alveoli so small and uncountable in number?

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Alveoli are uncountable in number in order to increase the exchange of gases in the lungs. They are too small so that number of alveolus can fit in it and increase the exchange of gases.

1398.

7CD ‘%O ANNTWL१८८2-27'[ निरका o |ग )>Aasreoएज &Lob &,=&£ZaiyA gS f 1 ही o

Answer»

An ovary contains at least oneovule. Inside an ovule, cells divide to produce aneggand two other cells calledpolar nuclei. These three cells arehaploid, which means they have one set of chromosomes, and is designated byn. Most cells in angiosperms arediploid, or have two sets of chromosomes. In diploid (2n) cells, one set of chromosomes comes from the male parent and the other set comes from the female parent.

In addition to eggs and polar nuclei, sperm cells from a pollen grain are also haploid. Once the pollen tube reaches themicropyle, or the opening of an ovule, it releases two haploid sperm cells into the ovule. One sperm cell will fuse with the egg, resulting in a diploid zygote. The other sperm cell will fuse with the two polar nuclei, creating atriploid(3n) structure that will grow rapidly into the endosperm.

Like my answer if you find it useful!

1399.

Que. 16] Enlist the accessory pigments in algae.

Answer»

Accessory pigments are light-absorbing compounds, found in photosynthetic organisms, that work in conjunction with chlorophyll a. They include other forms of this pigment, such as chlorophyll b in green algal and higher plant antennae, while other algae may contain chlorophyll c or d.

1400.

17) Name four pigments present in leaves which helps in photosynthesis.

Answer»

chlorophyll, carotenoids, flavonoids, betalains