Refracting telescopes Lenses are curved pieces of glass or plastic, which bend rays of light and can make objects appear bigger. Refracting telescopes use one or more lenses to collect and focus the light from objects in space, forming an image. Then, an eyepiece lens enlarges, or magnifies, the imageRead More →

Lake Pontchartrain began forming about 5,000 years ago when North American glacier melts caused the Mississippi River to swell and shift to the east. The river began depositing its sediments into the Gulf of Mexico, creating a broad delta which would later become Orleans, St. Bernard, and Plaquemines Parishes. IsRead More →

Millions of years ago, algae and plants lived in shallow seas. After dying and sinking to the seafloor, the organic material mixed with other sediments and was buried. Over millions of years under high pressure and high temperature, the remains of these organisms transformed into what we know today asRead More →

A protein dimer called ‘tubulin’ (molecular weight 110000) composed of two monomeric subunits called ‘alpha and beta tubulin’ (molecular weight 55000 each), differing from each other in only a few amino acid residues, comprises the basic structural unit of microtubules. How does dimerization occur? A dimerization is an addition reactionRead More →

Answer: A tetrahedral void is formed when one sphere or particle is placed in the depression formed by three particles. … An octahedral void is formed when three close – packed spheres forming an equilateral triangle, are placed over another set of three spheres, in opposite directions. How are tetrahedralRead More →

River bank erosion occurs when water wears away at the banks of a river or stream. While river erosion is a naturally occurring process, human impact can increase its rate. Common contributing factors to river and stream bank erosion include: … River redirection around infrastructure or debris in the channel.Read More →

Lifestyle and home remedies Pain relievers. Over-the-counter medications such as ibuprofen and naproxen sodium may provide short-term pain relief. Avoid activity that causes pain. You may need to practice your sport less often or temporarily switch to a lower impact sport. … Ice. Apply ice after activity that causes pain.Read More →

One reason the moon has craters because it gets hit by objects, small pieces of rocks that come from outer space. These are pieces of asteroids, comets that are flying around in the solar system. When they hit the surface, there’s an impact. The moon has no atmosphere, and soRead More →

At present, evidence of two major pathways is found. One is that the vesicle is formed on the membrane surface, either at the plasma membrane at the cell surface or at internal cell organelles like the TGN. Another possibility is that vesicles formed elsewhere dock at, fuse with, and thenRead More →