All prokaryotes have plasma membranes, cytoplasm, ribosomes, and DNA that is not membrane-bound. Most have peptidoglycan cell walls and many have polysaccharide capsules. What are the parts of prokaryotic and eukaryotic cells? Summary All cells have a plasma membrane, ribosomes, cytoplasm, and DNA. Prokaryotic cells lack a nucleus and membrane-boundRead More →
Triceratops was about 30 feet long (9 m), 10 feet tall (3 m), and weighed up to 6-12 tons. It had a short, pointed tail, a bulky body, column-like legs with hoof-like claws, and a bony neck frill rimmed with bony bumps. It had a parrot-like beak, many cheek teeth,Read More →
Electric motor designs can vary quite a lot, though in general they have three main parts: a rotor, a stator and a commutator. These three parts use the attractive and repulsive forces of electromagnetism, causing the motor to spin continually as long as it receives a steady flow of electricRead More →
Each day, your heart beats around 100,000 times. This continuously pumps about five litres (eight pints) of blood around your body through a network of blood vessels called your circulatory system. This blood delivers oxygen and nutrients to all parts of your body to help your organs and muscles workRead More →
Interchangeable parts, popularized in America when Eli Whitney used them to assemble muskets in the first years of the 19th century, allowed relatively unskilled workers to produce large numbers of weapons quickly and at lower cost, and made repair and replacement of parts infinitely easier. Who developed the system ofRead More →
Parts of an Angle: Arms: The two rays joining to form an angle are called arms of an angle. Here, OA and OB are the arms of the ∠AOB. Vertex: The common end point at which the two rays meet to form an angle is called the vertex. Here, theRead More →
Each flower has between four and nine petals, four ovules and two locules. They have two stamens brandishing extremely short filaments, with linear or ovate bracts, with a bell-shaped calyx. Jasmine flowers also boast fruits in the shape of berries that change to black when ripe. Why jasmine plant isRead More →
The electromagnetic spectrum includes, from longest wavelength to shortest: radio waves, microwaves, infrared, optical, ultraviolet, X-rays, and gamma-rays. What do you mean by electromagnetic spectrum? The electromagnetic spectrum is a continuum of all electromagnetic waves arranged according to frequency and wavelength. The sun, earth, and other bodies radiate electromagnetic energyRead More →
Dholavira was different from most Indus cities as it was divided into three parts, i.e. the citadel, a middle town and a lower town. These parts were enclosed by stone walls. What was so interesting about the first cities in India? The villages that were built along the Indus RiverRead More →
Let’s take a look at the below function which we have inserted in the cell A1. Now if you look at the formula bar you can understand the structure of the function by splitting it into two parts i.e. name and arguments. What are the Excel functions? What is anRead More →