What is double circulation briefly explain the process in humans? The oxygenated blood from the lungs returns to the heart, which is pumped again into different parts of the body by the heart. Thus, the blood passes twice through the heart making one complete round through the body. This is called double circulation. What is […]

How does geographic isolation lead to the formation of new species? Explanation: The development of new species due to geographical separation is known as allopatric speciation. With the two groups of organisms no longer interbreeding, their gene pools become separate. Genes are no longer exchanged between the two groups, allowing them to diverge into two […]

What are the two major influences on development at all stages? Genetics, environmental influences, parenting styles, friends, teachers, schools, and the culture at large are just some of the major factors that combine in unique ways to determine how a child develops and the person they will one day become. Which term names the links […]

What does lysozyme do in tears? Lysozyme, enzyme found in the secretions (tears) of the lacrimal glands of animals and in nasal mucus, gastric secretions, and egg white. Discovered in 1921 by Sir Alexander Fleming, lysozyme catalyzes the breakdown of certain carbohydrates found in the cell walls of certain bacteria (e.g., cocci). What is a […]

What catalyst is used in fermentation? enzyme zymase What enzymes are needed for fermentation? Several enzymes are required in dough to convert starch into simple sugars that yeast can feed on. This is a complex process and involves the enzymes alpha and beta amylase. If these enzymes are present they can digest starch and provide […]

What are the 4 main types of galaxies? In 1936, Hubble debuted a way to classify galaxies, grouping them into four main types: spiral galaxies, lenticular galaxies, elliptical galaxies, and irregular galaxies. More than two-thirds of all observed galaxies are spiral galaxies. Which country has the brightest future? For the fifth consecutive year, Asian nations […]

What is classed as a heavy drinker? The U.S. Department of Agriculture defines heavy drinking in men as five or more drinks at one time or 15 or more drinks over the course of one week. For women and adults over 65, this limit is defined as four or more drinks on one occasion or […]

Which finding in a newborn is suggestive of tracheoesophageal fistula? The finding in a newborn suggestive of tracheoesophageal fistula is: After birth, a newborn with tracheoesophageal fistula will vomit and choke when the first feeding is introduced. 2. A child is brought to the pediatric clinic because he has been vomiting for the past 2 […]

How is redshift used to measure distance? Cosmological Redshift Astronomers also use redshift to measure approximate distances to very distant galaxies. The more distant an object, the more it will be redshifted. The more distance between us and a galaxy, the more quickly the galaxy will appear to be moving away from us. How do […]

Which plant structure makes seeds? carpels What are examples of seeding plants? Conifers are seed plants; they include pines, firs, yew, redwood, and many other large trees. The other major group of seed-plants are the flowering plants, including plants whose flowers are showy, but also many plants with reduced flowers, such as the oaks, grasses, […]