Both are achiral, since the disubstituted six-membered ring has a plane of symmetry. These isomers are diastereomers of each other, and are constitutional isomers of the 1,2- and 1,3- isomers. Which of the following are conformations of cyclohexane? Principal conformers Chair conformation. Boat and twist-boat conformations. Chair-chair. Twist-boat – twist-boat.Read More →
Animal husbandry is the branch of science deals with the practice of breeding, farming and care of farm animals such as cattle, dogs, sheep and horses by humans for advantages. Animal husbandry refers to livestock raising and selective breeding. It is a branch of agriculture. What are 5 animals involvedRead More →
An example of a transitive law is “If a is equal to b and b is equal to c, then a is equal to c.” There are transitive laws for some relations but not for others. A transitive relation is one that holds between a and c if it alsoRead More →
Cathodic protection is often used to mitigate corrosion damage to active metal surfaces. It is used all over the globe to protect pipelines, water treatment plants, above and underwater storage tanks, ship and boat hulls, offshore production platforms, reinforcement bars in concrete structures and piers, and more. What is cathodicRead More →
Electron microscopes are used to investigate the ultrastructure of a wide range of biological and inorganic specimens including microorganisms, cells, large molecules, biopsy samples, metals, and crystals. Which type of microscopy has the greatest resolving power? Different types of microscope have different resolving powers. Light microscopes let us distinguish objectsRead More →
mechanoreceptors. detect mechanical deformation e.g. touch or pressure in the skin; stretch receptors in muscles. * mechanoreceptor cells respond to a change in the external stimulus (pressure, temperature, etc) by producing voltage pulses across neurons (i.e. generator potentials) . What does the Mechanoreceptor do? Mechanoreceptors are an important receptor classRead More →
“I’m going to Europe to study the following year.” “She got sick the following day.” “I will be out of the office the following week.” “You can reach me at the following address.” How do you start a sentence with following? It is fine to use “the following” by itself.Read More →
Apical meristems give rise to the primary plant body and are responsible for the extension of the roots and shoots. Lateral meristems are known as secondary meristems because they are responsible for secondary growth, or increase in stem girth and thickness. Which of the following meristem is responsible for secondaryRead More →
Implantation. Once the embryo reaches the blastocyst stage, approximately five to six days after fertilization, it hatches out of its zona pellucida and begins the process of implantation in the uterus. What are the stages of implantation? Implantation consists of three stages: (a) the blastocyst contacts the implantation site ofRead More →
Stress is often described as a “disease of prolonged arousal” that leads to a cascade of negative health effects whose likelihood increases with on-going stress. Nearly all body systems become potential targets, and the long-term effects may be devastating. What is the most documented health consequence of unrelenting stress? But,Read More →