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A scanner is an input device that scans documents such as photographs and pages of text. When a document is scanned, it is converted into a digital format. Scanners work in conjunction with computer software programs, which import data from the scanner.

Track Ball : A trackball is an input device used to enter motion data into computers or other electronic devices. Trackballs designed for computers generally serve as mouse replacements and are primarily used to move the cursor on the screen.

Dopamine and serotonin are both neurotransmitters. Neurotransmitters are chemical messengers that regulate countless functions and processes in yourbody, from sleep tometabolism. While dopamine and serotonin affect many of the same things, they do so in slightly different ways.

During aCT scan, the patient lies on a bed that slowly moves through the gantry while the x-ray tube rotates around the patient, shooting narrow beams of x-rays through the body. Instead of film,CT scannersuse special digital x-ray detectors, which are located directly opposite the x-ray source.please like the solution 👍 ✔️👍✔️

Adecomposition reactionoccurs when one reactant breaks down into two or more products. It can be represented by the general equation:AB → A + BIn this equation, AB represents the reactant that begins the reaction, and A and B represent the products of the reaction. The arrow shows the direction in which the reaction occurs.

Latent heat is thermal energy released or absorbed, by a body or a thermodynamic system, during a constant-temperature process — usually a first-order phase transition

1. Taxonomic Studies:

Botanical gardens provide valuable information on various plants Local flora, bonsai, rare plants etc. They act as “outdoor laboratories” for students and researchers.

2. Botanical Research:

Botanical gardens supply wide range of plant species, seeds, flowers, fruits for botanical research.

3. Conservation:

Botanical gardens conserve and propagate rare species and genetic diversity.

4. Education:

They supply facilities for courses in local flora, horticulture, hybridization, plant propagation, etc. There educational programmes include workshops, training sessions for teachers, students, naturalists

5. Public Services.

They help the public in identifying the local and exotic plant species; provide instructions for home gardening’s, propagation of plants; supply plant resource;, through sale or exchange.

6. Aesthetics and Recreation:

They attract people who have made gardening their hobby.

degradation in the quality of soil,causes diseases if sum1 inhales it eg:endosulphan.Eutrophication - the run of water when mixed with pond river etc. It will result in sudden increace of algae and it will harm aquatic animals

DNA is called theblueprint of life because it contains the instructions needed for an organism to grow, develop, survive and reproduce.

DNA does this by controlling protein synthesis.

Proteins do most of the work in cells, and are the basic unit of structure and function in the cells of organisms

1.) Release of Pollen much before or much after the stigma is ready to accept it (receptiveness of stigma) .

2.) Placement of anther & stigma at such positions so that the pollens do not reach the stigma of the same plant or the same flower.

3.) It is a chemical method in which the stigma inhibits the growth of the pollen tubes into the pistil. This process is known as SELF-INCOMPATIBILITY

4.) Production of flowers or plants that are UNISEXUAL i.e. the plant or flower exhibit dioecy.

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bhen itna bada kyu de diya

Soils are formed through the interaction of fivemajorfactors: time,climate,parent material,topographyand relief, andorganisms. The relative influence of each factor varies from place to place, but the combination of all five factors normally determines the kind of soil developing in any given place.

DNA copying is essential in reproduction because :-

1) Maintaining the body design that helps an organism to survive in the environment.The DNA is transferred from parents to offspring that makes them similar in many ways.

2) To maintain the stability of population of a particular species, DNA copying is important .

1ans:DNA(Deoxyribonuclei acid) is the genetic material found in the chromosomes,which are present in the nucleus of a cell.the DNA is the informative site for making proteins and each specific type of protein leads to a specific type of body designs. Thus,it is the DNA molecule that determines the body design of an individual.Therefore,it can be concluded that it is the DNA that gets transferred from parents to offsprings and makes them look similar.

2.Variationsarebeneficialfor the survival of thespecies. Populations of organisms fill well-defined places, or niches, in the ecosystem, using their ability to reproduce. However, niches can change because of reasons beyond the control of the organisms and could even wipe out the entire population.

1 ans:DNA copying in reproduction is important for maintenance of body design and features. Moreover, DNA copying leads to variations. Variation is useful for survival of species.

Ans :- Solar energyis agoodalternative to replace fossil fuel as the majorenergysource becausesolar powerisrenewableat absolutely no cost to supplyenergyinfinitely.

Therefore,solar energythat is harmless to the environment will be the majorenergysource forfuture- starting today.

Solar EnergyBenefits.

You can help protect the environment now and forfuturegenerations by producing your own cleansolar energy.

Everysolar powersystem we install decreases the amount of fossil fuels needed to generate electricity, which in turn reduces the pollutants contributing to global warming.

In chemistry, an organic compound is generally any chemical compound that contains carbon. Due to carbon's ability to catenate, millions of organic compounds are known. Study of the properties and synthesis of organic compounds is the discipline known as organic chemistry.Proteins, among the mostcomplexof all organic compounds,

Negative effect on environment is global warming

Drug addiction, deforestation

The complementary mRNA strand is CCUGACUAA

DNA ligase is right

i. Carbon monoxide (CO)—a colorless, odorless, tasteless, and toxic air pollutant—is produced in the incomplete combustion of carbon-containing fuels, such as gasoline, natural gas, oil, coal, and wood. The largest anthropogenic source of CO in the United States is vehicle emissions

ii. Health Impacts of Sulfur Dioxide Emissions.

Airpollution in the form of sulfur dioxide can have detrimental effects on human health. Such effects include breathing problems, particularly in asthmatics, whereas short-term exposure canleadto chest tightness and coughing and wheezing.

Sourcesof NOx Pollution. NOx is produced from the reaction ofnitrogenand oxygen gases in the air during combustion, especially at high temperatures. In areas of high motor vehicle traffic, such as in large cities, the amount ofnitrogen oxidesemitted into the atmosphere as air pollution can be significant.

a. About 99% of the sulfur dioxide in air comes from human sources.

The main source of sulfur dioxide in the air is industrial activity that processes materials that contain sulfur, eg the generation ofelectricityfromcoal,oil orgasthat contains sulfur.

b. In areas of high motor vehicle traffic, such as in large cities, the amount ofnitrogen oxidesemitted into theatmosphereasair pollution can be significant.

c. Vehicle emissions

d. CFCsare used inairconditioners and refrigerators

b)NOx gasesreact to formsmogandacid rainas well as being central to the formation of fine particles (PM) andground level ozone, both of which are associated with adverse health effects

a) due to excessive presence of sulphar di oxide acid rain is produced

d) CFCs are the Main cause of depletion of ozone layer

c)Symptoms and HealthEffects. BreathingCOcan cause headache, dizziness, vomiting, and nausea. IfCOlevels are high enough, you may become unconscious or die. Exposure to moderate and high levels ofCOover long periods of time has also been linked with increased risk of heart disease.

TheCalvin cycle(also known as the Benson-Calvin cycle) is the set of chemical reactions that take place in chloroplasts during photosynthesis. Thecycleis light-independent because it takes place after the energy has been captured from sunlight.

Huntington's disease is autosomal dominant and sickel cell anaemia is autosomal recessive disorder

Autosomal dominant - Myotonic dystrophy Autosomal recessive - Phenylketonuria / sickle cell anaemia / cystic fibrosis / Thalassaemia.Read more on Sarthaks.com - https://www.sarthaks.com/189996/name-one-autosomal-dominant-and-one-autosomal-recessive-mendelian-disorder-in-humans

Huntington's disease is autosomal dominant nd haemophilia is autosomal recessive disorder

1) Gene therapy is an experimental technique that uses genes to treat or prevent disease. 2) vector is a geometric object that has magnitude and direction.3)restriction enzyme is an enzyme that cleaves DNA into fragments at or near specific recognition sites within the molecule known as restriction sites

i think ans. of the qsn no.2 is not correct

Human skin color is a “polygenic” trait, meaning multiple gene loci are involved in its expression. At last count, the International Federation of Pigment Cell Society has determined that there are a total of378 geneticloci involved in determining skin color in human and mice

Human skin color is influenced by an intergenic DNA polymorphism regulating transcription of the nearbyBNC2pigmentation gene .

In biology, a gene is a sequence of nucleotides in DNA or RNA that codes for a molecule that has a function. During gene expression, the DNA is first copied into RNA. The RNA can be directly functional or be the intermediate template for a protein that performs a function.

Hold the leafwithboth your such that the dorsal side of the leaf is facing you ad both the thumbs are over the leaf.

Gently tear the leaf by applying force with your thumbs.

When a small partition is formed, gradually remove one of the side of the crack in the leaf.

Slowly separate the rest part of the leaf and immediately put it inside the china dish containing water so that it doesn't trap any air bubbles.

With the help of a knife, cut the transparentepidermal layer obtained.

gene editing is the change in genes which led to evolution

In biology, a gene is a sequence of DNA or RNA that codes for a molecule that has a function. During gene expression, the DNA is first copied into RNA. The RNA can be directly functional or be the intermediate template for aproteinthat performs a function.

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A,B,C,D,E,F,G,H,I,Jis correct answer

a,b ,c ,d,e,f,j,h,I,j is the right answer

5' T A C G T A C G TA TG 3'

Transcription is the first step of DNA based gene expression, in which a particular segment of DNA is copied into RNA...

Transcription, the synthesis of RNA from DNA. ... This flow of information occurs through the sequential processes of transcription (DNA to RNA) and translation (RNA to protein). ... Small segments of DNA are transcribed into RNA by the enzyme RNA polymerase, which achieves this copying….

formation of RNA from DNA is called transcriptome with help of m-rna.

Transcription is the first step of gene expression, in which a particular segment of DNA is copied into RNA by the enzyme RNA polymerase. Both DNA and RNA are nucleic acids, which use base pairs of nucleotides as a complementary language.

Polymorphism, in biology, a discontinuousgenetic variation resulting in the occurrence of several different forms or types of individuals among the members of a single species. A discontinuousgeneticvariation divides the individuals of a population into two or more sharply distinct forms.

Translation refers to the process of creating proteins from an mRNA template. The sequence of nucleotides on the RNA is translated into the amino acid sequence of proteins and this reaction is carried out by ribosomes.

Bioinformatics is an interdisciplinary field that develops methods and software tools for understanding biological data. As an interdisciplinary field of science, bioinformatics combines biology, computer science, information engineering, mathematics and statistics to analyze and interpret biological data.

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Initiation.Transcription in prokaryotes(and in eukaryotes) requires the DNA double helix to partially unwind in the region of mRNA synthesis. ... The DNA sequence onto which the proteins and enzymes involved intranscriptionbind to initiate the process is called a promoter.

option a) replication

bacteriophage is a virus that invades bacteria.

so, option B

D statement is correct

Nitrifying bacteria are chemolithotrophic organisms that include species of the genera Nitrosomonas, Nitrosococcus, Nitrobacter and Nitrococcus. These bacteria get their energy by the oxidation of inorganic nitrogen compounds. Types include ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB).

a) a Chinese school boy as in terms of evolution they have same traits as we have

but this app shows chimpanzee

how? as Chinese boy is a human being and we are humans also. yeah that is correct our ancestors are chimpanzee but we are more similar to Chinese boy as according to your question we to figure out the most common.

ya thanks

in term of evolutionary we are common in a chimpanzees

how

don't confuse sinisterson, In evolutionary terms we both belong to same species that isHomo sapiens. Rest of the things I have clarified earlier. so answer is Chinese boy

Dengueisspreadthrough the bite of the female mosquito (Aedes aegypti). The mosquito becomes infected when it takes the blood of a person infected with the virus. After about one week, the mosquito can then transmit the virus while biting a healthy person. ...Denguecannot bespreaddirectly from person to person

While some drugs, such as acetaminophen (also known as Tylenol), elicit predictable and dose-dependent effects on the liver, others may have unforeseeable results, oftentimes unrelated to dose.

dopingis the use of bannedathleticperformance-enhancing drugs byathleticcompetitors. The termdopingis widely used by organizations that regulate sporting competitions.

chromatography is not the answer

Doping testingis an activity that is strictly specified in the International Standard forTestingand Investigations. Urine, blood or both are collected astestsamples.Doping testingtakes place both at competitions and outside of them

I am just giving you a methodas there are so many methods

Definition &Principleinchromatography. It is defined astheprocess of separation oftheindividual components of a mixture based on their relative affinities towards stationary and mobile phases.Principle:Thesamples are subjected to flow by mobile liquid onto or throughthestable stationary phase

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