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In eukaryotes, chromosomes are fixed, self-replicating components of the cell nucleus. DNA and chromosomes carry genetic information from one generation to the next. Depending on the species, the number of chromosomes might be different. Humans, like many other animal and plant species, are diploid creatures (2n), meaning that the chromosomes are organized into sets of two. By using an optical microscope, scientists can observe chromosomes as they duplicate (metaphase). Each metaphase chromosome is made up of two components termed sister chromatids. They're both identical since DNA is copied throughout cell division. What are Homologous Chromosomes? Homologous chromosomes are present in ... Read More
Coronavirus, or covid-19, is a respiratory infection that is now affecting many individuals in many different nations. Millions of people died as a result of the Spanish flu pandemic that occurred between 1918 and 1920. What is Coronavirus? Coronavirus, also known as COVID-19, is a pandemic in which a virus is causing respiratory sickness and killing more people than the typical seasonal flu. Genetics and origin of the coronavirus − The covid-19 coronavirus seems to have emerged originally in China, where it spread from an animal to a person. The specific host animal from which the virus originated is ... Read More
ARP and RARP are the LAN (Local Area Network) protocols. A LAN is a fast, fault-tolerant data network that only covers a limited area of land. There are three types of LAN data transmissions unicast, multicast, and broadcast. A single packet is transferred from the source to a destination on the network during a unicast transmission. A single data packet is copied and delivered to a certain group of network nodes as part of a multicast transmission. A single data packet is copied and delivered to every network node as part of a broadcast transmission. Both ARP and RARP use ... Read More
Mesh topology is a type of network topology in which every node is connected to every other node in the network. This topology provides a high level of redundancy and error tolerance, making it a popular choice for large-scale networks. However, the major disadvantage is it is costly because it consumes a lot of wires to connect it’s like connecting n-size mesh requires $\mathrm{n_{c_{2}}}$. In this article, we will discuss the advantages and disadvantages of Mesh topology. Advantages High Reliability − Mesh topology offers a high level of reliability, which is one of its biggest advantages. There is no ... Read More
A hub is a networking device that is used to connect multiple devices in a network. Its main function is to receive data from one device and then broadcasted it to all its ports. It works at the physical layer of the ISO/OSI model. This is also called a multiport repeater because it does broadcast to every port in which some devices are connected. and to do this it uses fiber optics cable or twisted pair cable. It works in half duplex mode. It has many advantages and disadvantages; in this article, we will be exploring some of those which ... Read More
Computer Security means protecting your data and information from harm, theft, attackers, and unauthorized access. Let’s consider one simple example of why security is necessary. Today, children play online games by downloading them from Play Store and Chrome or using other sites. They don’t have proper knowledge about the third-party sites or malware functions attached to them. They download those games and applications on their computer, play games, and do other stuff. After some time they came to find out that some files on their computer were missing and the system was not working. Or Considering examples when some unprotected ... Read More
Mobile devices are something we keep so much private information in. It keeps our data such as personal pictures of family, and friends, special events, important documents, audio and videos, and certain other confidential files which are necessary for our life. Keeping all this information secure and private is very important and it is a challenging task to secure it. But as we know security always starts with us, we people have to be careful while sharing our data outside the world, even on social media. It can affect mental and physical health. So to keep it secure and safe, ... Read More
What is Raspberry Pi? Raspberry Pi is a small computer whose size is similar to that of a credit card. You can plug the computer into a monitor or TV and use standard keyboard and mouse as input devices. The system can help you to make programs in Python and Scratch languages. You can do everything on this computer in the same way as on its desktop counterpart. You can play games, work on word processing software, spread sheets, and many more. Why Raspberry Pi Alternatives? There are a few disadvantages with Raspberry Pi which are listed below − ... Read More
What is PDF Drive? PDF Drive is a search engine that will help you to search and download PDFs. The website has more than 75 million books articles, magazines, etc. There is a long list of categories some of which include business, career, health, medicine, arts, and many more. You can either scroll through the books or search for the one that you are looking for. You can create a free or premium account to get the books. Cost of PDF Drive PDF Drive has both free and premium versions. You can download books through both accounts but cloud storage ... Read More
What is IDM? Internet Download Manager or IDM is an app which can speed up the downloading of your files. If the downloads are broken or paused, IDM will resume them to download the files. Downloads may be interrupted due to many reasons like server down, slow speed of internet, computer shutdown, and many more. Cost of IDM Cost of registration in IDM can be found in the table below − Cost in Indian rupees Number of years Number of systems 970 1 1PC 2020 Lifetime 1PC 800 1 2 and more ... Read More