Expert insights and detailed technical documentation about science.
Score: 4.2/5 (72 votes) A: The usual past participle of “show” (that is, the form of the verb used with “had” or “have”) is “shown.” But “showed” is also acceptable and not a mistake.Should have shown or showed?The usual choice in such instances is "shown." While some handbooks say that "showed" is ...
Score: 4.5/5 (75 votes) Preadaptation is: the use of an anatomical feature in a way unrelated to the feature's original function.What is preadaptation in biology?The term preadaptation in evolution refers to a large change in function accomplished with little or no change in structure (Ridley, ...
Score: 4.9/5 (63 votes) Acromegaly affects about 6 per 100,000 people. It is most commonly diagnosed in middle age. Males and females are affected with equal frequency. It was first described in the medical literature by Nicolas Saucerotte in 1772.When was acromegaly first discovered?However, it was...
Score: 4.6/5 (5 votes) Clean and sanitize a food contact surface after working with raw meat, when switching from one food to another, when switching tasks, after taking a break, and after four hours of constant use.When must the cleaning step occur when cleaning and sanitizing in a three-compartmen...
Score: 4.7/5 (5 votes) Retrenchment is a form of dismissal due to no fault of the employee, it is a process whereby the employer reviews its business needs in order to increase profits or limit losses, which leads to reducing its employees.What is the meaning of retrenched employee?“Retrenchment is ...
Score: 4.5/5 (68 votes) Most jewelry contains alloys. Allergic reactions to metals such as nickel or copper can cause a chemical reaction frequently changing the color of your jewelry. But because pearls are generally hypoallergenic, reactions such as these, are rare.Does mother of pearl yellow with...
Score: 4.2/5 (72 votes) The thorax is also called the chest and contains the main organs of respiration and circulation.Is the thorax the chest wall?The thoracic, or chest wall, consists of a skeletal framework, fascia, muscles, and neurovasculature – all connected together to form a strong and prot...
Score: 4.7/5 (29 votes) Witch hazel can reduce both itching and pain, two main symptoms of hemorrhoids. It's a natural anti-inflammatory, so it could also reduce swelling. Witch hazel can be purchased in liquid form and applied directly to the hemorrhoids.Can witch hazel make hemorrhoids worse?...
Score: 4.5/5 (10 votes) Vacuum cleaners' simple yet effective design has done away with having to clean dust and other small particles off surfaces by hand, and turned house cleaning into a more efficient and fairly rapid job. Using nothing but suction, the vacuum whisks away dirt and stores it...
Score: 4.6/5 (46 votes) Vitamin E is a fat-soluble nutrient found in many foods. In the body, it acts as an antioxidant, helping to protect cells from the damage caused by free radicals. Free radicals are compounds formed when our bodies convert the food we eat into energy.What is the benefits of ta...
