Friday, 31 July 2020

Pollination by honeybees

Last Sunday, my brother and I were enjoying our leisure time reading books in our garden. Mom has planted so many beautiful plants with different coloured flowers. I got distracted by the buzzing of a honeybee. My instant reaction was to shoo it away. But my brother asked not to do so and we sat there observing the honeybee.
Honeybees look quite magnificent with their black and bright yellow colours. We watched that honeybee move from one flower to another buzzing lightly while doing so. My brother told me that the buzzing sound is because of their wings, which are smaller than their body. Due to this, they must flap their wings more frequently to fly.
He also told me many other fun facts about honeybees. Did you know that they are social insects, i.e. they live in colonies? They also have job segregation. Worker bees build hives and collect nectar, a single queen bee rules the hive, etc. They also communicate with each other via dance. But the fact which fascinated me the most was their role in the process of pollination.
We had studied in school that pollination is important for plants to reproduce. I decided to make pollination as my Sunday project and dived into gathering more information.
So, to understand the process of pollination, we must first understand the parts of a flower. I found that, in a bisexual flower, both male and female parts are present, e.g. hibiscus flower.
The male part consists of anthers and filaments. The anther contains pollen sacs which are full of pollen grains. Pollen grains come in various shapes and sizes. The female part of a flower consists of a stigma, style, and an ovary. Stigma is soft like a cushion and slightly sticky. Pollens are transferred to the stigma part of a flower. From the stigma, pollen travels to the ovary by forming a pollen tube and this leads to the formation of seeds and fruits.
Now you must be wondering, how is this related to pollination? Well, unless pollen reaches a stigma, none of the later stages of seeds and fruits formation can occur. This is where pollinators (pollen carriers) play a major role. Honeybees are not the only pollinators though. There are various agents of pollination.
Honeybees are one of the biotic agents of the pollination process. Honeybees fly from one flower to another to collect nectar, which is converted into honey by enzymatic reactions. When honeybees feed on a flower, pollen grains stick to their legs and body. When they move to another flower, they carry those pollen to the stigma. This is the process of pollination.
Pollination is of two types, self-pollination and cross-pollination.
Self-pollination is when pollination occurs by pollens produced by the same flower or another flower of the same plant.
Cross-pollination is when pollination occurs by pollens produced by another flower of the same species or different species.
Self-pollination reduces the chance factor of pollination, thereby ensuring seed and fruit production. It also maintains a pure line of genes. On the other hand, seed production in cross-pollination is less probable. However, by cross-pollination, new and better genes may get introduced which may provide evolutionary benefit to the plant. Thus, both types of pollinations are equally important.
It is important to protect pollinators, as approximately one-third of our agriculture is dependent on pollination by biotic pollinators. Pesticides, fertilizers, and increasing pollution are endangering pollinators like honeybees. We need to protect these tiny workers who help us in growing food. We can do so by reducing the use of chemicals in agriculture, reducing air pollution, practising traditional methods of agriculture, and improving bee husbandry.
So, the next time you see honeybees in your garden, instead of killing or shooing them away, you should thank them. But make sure you maintain sufficient distance because they can sting if they feel that they are in danger.
There are many more interesting facts about honeybees, like how and when do they know to dance? Why does a honeybee die after stinging someone? How exactly is nectar converted to honey? Maybe I will explore these questions in my next project.
Akshara is an exam oriented app for CBSE X grade, Karnataka SSLC, and BSc Nursing. Akshara helps you learn methodically and use modern techniques like Flashcards, which makes the content easy to memorize. The app runs on android mobile and tablets.
visit this link to download two free chapters. For any queries visit us on https://www.aksharaontech.com

Thursday, 30 July 2020

Trick to verify the answers obtained using Factorization Method

A Quadratic polynomial is of the form ax^2+bx+c. When the standard quadratic polynomial is equated to zero, it becomes a quadratic equation. Usually, factorization method is used to find the roots of the quadratic equation, i.e. splitting the middle term. Here, two tricks are proposed to verify the roots of the quadratic equation in a very less time.
Verification of the problem is very important because sometimes the whole problem may go wrong just because the roots obtained are wrong. So, checking the answers before proceeding to the next step is important.  
Akshara is an exam oriented app for CBSE X grade, Karnataka SSLC, and BSc Nursing. Akshara helps you learn methodically and use modern techniques like Flashcards, which makes the content easy to memorize. The app runs on android mobile and tablets.
visit this link to download two free chapters. For any queries visit us on https://www.aksharaontech.com 

Wednesday, 29 July 2020

How to overcome the fear of maths

Maths is the base for many scientific and technological discoveries. It is one of the oldest subjects and is constantly being rejuvenated. Many of the other subjects are dependent on maths. Maths is all around us, and has an important role in our life. Right from a farmer, cook, doctor or a mechanic-everyone needs maths in their day-to-day life.
But thinking of maths gives most people jitters, they get sweaty and their heart beats faster. It’s fair to say maths is not everyone’s favorite subject. In fact, for many people, the feelings of tension and anxiety that arise when trying to solve a mathematical problem can be like hell. This is known as maths anxiety and this feeling of being a failure at maths can affect people’s mind badly.
For those who suffer with maths anxiety, it can be difficult to shift from a mindset of a failure to a more positive outlook when it comes to dealing with numbers. That is how, for many people, maths anxiety can become a lifelong issue. 
Students usually tend to inculcate fear of maths because of lack of confidence, lack of knowledge in basics, not understanding the concept properly, not studying the formulae, etc.
Here are some tips to overcome the fear of maths
  1. Don’t be scared to learn formulae
    Learning formulae is very important. So, make a note of all the formulas and go through them anytime and anywhere.
  2. Identify and accept the fear
    If we are afraid of anything we have to admit it, because just accepting the fear does not make you a failure. But not taking care of that fear may affect your life. Find the cause of the failure and work on it. Continuous hard work leads to success.
  3. Do not try to mug up the things
    Maths should never be confused with other subjects where mugging is required. Do not byheart the formulae or solutions, try to understand the procedure and then solve the problem.
  4. Do not read maths
    Do not sit and read maths like any other theory subjects. Sit and solve all the problems from the textbook.
  5. Ask questions when you do not understand
    If you do not understand the concept or any problem, get your doubts cleared by a teacher or your peers.
  6. Do not jump directly to the solution
    Always solve the problems step by step by understanding the logic of the problem. So that you avoid making mistakes. When one step is wrong, the whole problem will be wrong.
  7. Practice the problems based on the concept
    If one thinks they know a problem very well they should practice more on that concept and should make it a rule to do each and every problem present in the textbook.
  8. Make a test plan
    After practising all the problems, write a test. The test is only to measure how well you have understood the problems, and the time taken to solve the problem.
Akshara Best app for class 10th students. The content is built under the supervision of teachers with 40+ years of experience. Make your study life easier with your Smartphone. We are providing the best App at an affordable price.
https://bit.ly/3eaP39K visit this link to download two free chapters. For any queries visit us on https://www.aksharaontech.com 

Tuesday, 28 July 2020

Force – An action? Or a reaction?

Have you ever fallen hard on the floor? I’m sure you have. Ever wondered why the floor is not banged up like you are? According to Newton’s third law, for every action force there is an equal and opposite reaction force. So, you must have caused the same amount of damage to the floor that you have experienced, right? We’ll find the answer to that question soon. Before that, let’s slow down for a minute and look at what exactly happens when you fall on the floor. 
You have exerted force on the floor when you fell. The floor has also exerted the same amount of force, but in the opposite direction, i.e. on you. You see a bleeding wound on your knee. But, there is no proof on the floor of your falling. 
What do you think happened to the force exerted by you? Did it get cancelled out with the force exerted by the floor on you? No. The force exerted by you is on the floor and the force exerted by the floor is on you. You and the floor are two different systems. Thus, the forces do not get cancelled out.
Is the force exerted by the floor greater than the force exerted by you? No. The action and reaction forces are of equal magnitude.
Hmm….. What could have happened then? Let us see how familiar you are with Newton’s second law. 
The acceleration of an object is directly proportional to the unbalanced force applied and in the direction of force. To break it down, acceleration can occur only when the net force on an object is not zero. In our scenario, since the forces are acting on two different systems (floor and you) the net forces on both the systems are not zero.
This is starting to become a problem now. Where did the force exerted by you on the floor go? Before you get riled up. Have you thought about the masses? Force is directly proportional to the mass of the object. The mathematical equation of Newton’s second law of motion, F = ma will answer our question. Acceleration is inversely dependent on mass, i.e. the heavier an object is, the greater force you have to apply to accelerate it. Let me try and make it more simple for you. The forces are equal, the masses are unequal; hence, the accelerations are unequal. 
As you know, the floor is attached to the building, which is attached to the Earth. Earth as a whole is so much greater than you in mass. This is the reason the effect of the force exerted by you isn’t visible on a large scale. In other words, you can see no visible accelerations on the floor’s part.
This is why some objects bounce while others don’t move even an inch. Some common examples for you to analyse are – a runner running on a road. The runner applies force on the ground and pushes backward. The ground in turn pushes the runner forward. A person sitting on a chair is applying downward force on the chair. The chair in turn is applying upward force on the person and holding him in place. The basic point we need to understand is that a single force cannot exist. Forces are always an interaction between an action and its reaction.

Akshara Best app for class 10th students. The content is built under the supervision of teachers with 40+ years of experience. Make your study life easier with your Smartphone. We are providing the best App at an affordable price.

https://bit.ly/3eaP39K visit this link to download two free chapters. For any queries visit us on https://www.aksharaontech.com 

Monday, 27 July 2020

Why do plants bend towards the light?

Have you ever wondered why the money plant in your house turns more towards the light source? It is a type of tropic movement observed in plants. Tropic movements are the movements of plants in response to environmental stimuli. The phenomenon of growing towards light is called phototropism.
Tropic movements of plants differ from nastic movements of plants. In tropic movements, growth occurs towards the stimuli, however, in nastic movements, the plant moves away from the stimuli. Hormones are responsible for tropic movements, whereas nastic movements are due to turgor pressure.
Akshara is an exam oriented app for CBSE X grade, Karnataka SSLC, and BSc Nursing. Akshara helps you learn methodically and use modern techniques like Flashcards, which makes the content easy to memorize. The app runs on android mobile and tablets.

visit this link to download two free chapters. For any queries visit us on https://www.aksharaontech.com 

Friday, 24 July 2020

Debunking Public Myths on COVID-19 – A Pandemic


Since late 2019 and the beginning of the year 2020, the world has been suffering from an ongoing pandemic; COVID-19 caused by SARS-CoV-2. People of India and other parts of the world are experiencing worldwide shutdowns and region-wise lockdowns.
What is more interesting amid COVID-19 is the reconstruction of nature.
  • Endangered species being spotted at various places
  • Reduction in air pollution
  • Reduced vibrations on the earth
“Corona, quarantine, masks, 6 ft distance from each other”, these are currently the trending words. In the midst of all these, we also experience traffic in google search, as people all around the world are curious to know about the serious effects of the ongoing pandemic and work from home.
Despite the experiences shared by the people who have recovered from this pandemic, people are constantly in search of news regarding the spread and preventive measures of COVID-19.
It is advised that one believes in the facts and takes appropriate measures rather on MYTHS.
COVID-19 is the name of the disease and not of the virus.
COVID–19, previously known as “2019 Novel coronavirus” is a disease caused by the virus SARS-CoV-2 (Severe acute respiratory syndrome coronavirus 2). Like for any other viral disease, the virus and the disease are named by different names. 
COVID-19 is the acronym of “Coronavirus disease 2019”. The virus is termed ‘Novel’ as it’s a new virus. It began with an animal population, got transmitted to humans and presently can be transmitted from human to human. Our immune system has not encountered this strain of virus before, therefore we have not developed immunity. 
COVID-19 cannot be prevented by exposing oneself to high temperatures (more than 25 °C) or living in hot climate regions.
Countries with hot weather have reported COVID-19 cases. Therefore, you can still catch COVID-19 no matter how sunny or hot the weather is. 
If the virus can sustain in the normal average body temperature of 37 °C inside humans, then it is evident that it survives in higher temperatures. Again, hot baths are not going to work. 
“Adopt protective measures by washing your hands frequently and thoroughly and avoid touching your eyes, mouth, and pricking your nose.”

Staying in cold and snow regions cannot protect you from contacting the SARS-CoV-2. 
There is no evidence to prove that cold weather can destroy the coronavirus. The normal human body temperature remains within the range of 36.5 °C to 37 °C, regardless of the external temperature or weather. 
“WHO advises people of all ages to take steps to protect themselves from the virus, for example by following good hand hygiene and good respiratory hygiene.”
There is no evidence to prove that cold weather can destroy the coronavirus. The normal human body temperature remains within the range of 36.5 °C to 37 °C, regardless of the external temperature or weather. 
“WHO advises people of all ages to take steps to protect themselves from the virus, for example by following good hand hygiene and good respiratory hygiene.”
People of all age groups can be infected by the coronavirus.
COVID-19 infection is not specific to an age. Older people and people with pre-existing medical conditions (such as asthma, diabetes, heart disease) appear to be more vulnerable to becoming severely ill with the virus.
People infected with COVID-19 need not live with it forever. Individuals can recover from COVID-19.
If you contact the disease, make sure you treat your symptoms. If you have a cough, fever, and difficulty breathing, seek medical care early – but call your health facility by telephone first. Most patients recover thanks to supportive care.
The ability to hold your breath for 10 seconds or more without coughing or feeling of discomfort does not mean you are free from COVID-19.
Signs and symptoms may appear 2 – 14 days after exposure to the coronavirus.
The most common symptoms of COVID-19 are dry cough, tiredness, and fever. Some people may develop more severe forms of the disease, such as pneumonia. The best way to confirm if you have the virus-producing COVID-19 disease is with a laboratory test. You cannot confirm it with such breathing exercise. Holding your breath for 10 seconds can even be dangerous.
Consumption of alcohol does not protect you from contacting COVID-19.

Consuming alcohol can increase your risk of health problems and overdose is fatal.
Agents like mosquitoes and other insects cannot transmit the COVID-19.
COVID-19  mostly spreads through droplets produced when infected people sneeze or cough and by touching contaminated surfaces.
It’s easy to think of mosquitoes as tiny flying dirty syringes transferring droplets of infected blood from person to person. The reality is far more complex. When a mosquito bites and sucks up some blood that contains a virus, the virus quickly ends up in the gut of the insect. From here the virus may start utilising the nutrients and multiply or it may perish in the gut depending upon its genetic makeup.
“There is no evidence for COVID-19 infection being transmitted through agents like mosquitoes.”
Placing your hands under dryers will not prevent you from contacting the COVID-19 infection.
To protect yourself against the coronavirus, you should frequently clean your hands with an alcohol-based hand sanitizer or wash them with soap and water, at least for 20 seconds.
Once your hands are cleaned, you should dry them thoroughly by using tissues or a warm air dryer.
Spraying alcohol or chlorine all over the body may not destroy the coronavirus present inside your body.
Inhalation of chlorine gas/aerosols causes eye, nose and throat irritation, burning sensations, and sneezing. They also cause skin irritation. High exposure to chlorine may lead to nausea and vomiting.
Alcohol breaks down the immune system in the lungs, making them more susceptible for infections. It can also cause life threatening acute respiratory distress syndrome (ARDS).
Eating garlic and drinking jeera water is not an alternative for Corona vaccines or treatment of the same.

Garlic is a healthy food that may have some antimicrobial properties. However, there is no evidence from the current outbreak that eating garlic has protected people from the new coronavirus. Jeera water is only an immunity-boosting drink.
Vaccines for COVID-19 are under development.
People are dependent on vaccines rather than antibiotics to prevent and treat COVID-19 patients.
Antibiotics work only against bacterial diseases. And we know COVID-19 is a viral disease.
However, antibiotics are used to treat infected patients because bacterial co-infection is possible.
“There are no vaccines produced against corona virus. The virus is so new and different that it needs its own vaccine. Researchers are trying to develop a vaccine against 2019-nCoV, and WHO is supporting their efforts.”
Although there are no effective vaccines against 2019-nCoV as of now, general vaccinations against respiratory illnesses is advised to protect your health.
Akshara is an exam oriented app for CBSE X grade, Karnataka SSLC, and BSc Nursing. Akshara helps you learn methodically and use modern techniques like Flashcards, which makes the content easy to memorize. The app runs on android mobile and tablets.
visit this link to download two free chapters. For any queries visit us on https://www.aksharaontech.com 
Get more information and updates about COVID-19 from the following links.
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Gene editing

What is a gene?

Gene is part of a long DNA molecule  that is packed inside each cell of all living organisms starting from simple single-cell microorganisms to complex multicellular organisms.
DNA is an instruction manual in an organism, it is responsible for various traits we see such as the colour of our eyes. DNA is inherited from the parents. Each organism has two sets of genes for a character, one from each parent. These new sets of genes produce new instructions which get reshuffled in each generation. However, sometimes these genes may contain faulty instructions which may lead to serious illnesses.
Can the error in genes be corrected?
In a document, if we have misspelled a word, we use the ‘find’ function to highlight the error and correct it or delete it.
Imagine using ‘find and replace’ technique to find a faulty gene in a DNA sequence. This is possible using gene editing.
Gene editing is a group of techniques which enable scientists to manipulate the organism’s DNA. This technique enables genetic material to be added, removed, or altered at a particular location in the genome.
Scientists have figured out many ways to modify genes. E.g. crossbreeding of plants to produce a better yield. But the use of gene editing to modify genes has proved to be one of the best techniques. 
The technique of gene editing promises huge benefits as it is faster, simpler, and cheaper as compared to older methods of gene modification.
One of the recent gene editing techniques is done by using CRISPR-Cas9.
Clustered Regularly Interspaced Short Palindromic Repeats is a sequence information present in a bacterial genome, which is regularly interspaced and repetitive in nature. CRISPR is associated with a protein called Cas9 which acts as a molecular scissor.
Akshara Best app for class 10th students. The content is built under the supervision of teachers with 40+ years of experience. Make your study life easier with your Smartphone. We are providing the best App at an affordable price.
https://bit.ly/3eaP39K visit this link to download two free chapters. For any queries visit us on https://www.aksharaontech.com