Which is the control center for the endocrine system? hypothalamus How the hypothalamus controls the endocrine system? The hypothalamus produces several releasing and inhibiting hormones that act on the pituitary gland, stimulating the release of pituitary hormones. Of the pituitary hormones, several act on other glands located in various regions of the body, whereas other […]

What is the importance of homeostasis in the human body? Homeostasis maintains optimal conditions for enzyme action throughout the body, as well as all cell functions. It is the maintenance of a constant internal environment despite changes in internal and external conditions. In the human body, these include the control of: blood glucose concentration. What […]

What do contours on maps indicate? Contour line, a line on a map representing an imaginary line on the land surface, all points of which are at the same elevation above a datum plane, usually mean sea level. The diagram illustrates how contour lines show relief by joining points of equal elevation. What is the […]

What is not classified as a fossil fuel? Coal, oil and natural gas are examples of natural gas. Biogas is the mixture of gases produced by the breakdown of organic matter in the absence of oxygen, usually consisting of certain quantities of methane and other constituents. Therefore, biogas is not a fossil fuel. What are […]

Which describes an example of ecological succession? A meadow which is a type of grass replacing a pond in its flood plain is an example of ecological succession in an aquatic community. The replacement of native species of animal with invasive species cannot be considered as succession but rather an invasion. What is an example […]

What is a Centriole in biology? In cell biology a centriole is a cylindrical organelle composed mainly of a protein called tubulin. Centrioles are found in most eukaryotic cells. A bound pair of centrioles, surrounded by a highly ordered mass of dense material, called the pericentriolar material (PCM), makes up a structure called a centrosome. […]

What will happen to the resistance of the filament after the light bulb has burned for an hour? Since the current is inversely proportional to the resistance, as the resistance increases, the current decreases. However, for a light bulb, the resistance of the filament will change as it heats up and cools down. How does […]

What cell division occurs after fertilization? When a Zygote Becomes an Embryo The zygote divides through a process known as mitosis, in which each cell doubles (one cell becomes two, two becomes four, and so on). This two-week stage is known as the germinal period of development and covers the time of conception to the […]

Does the ozone layer help insulate the earth? It is a cause of melanoma and other types of skin cancer. It has also been linked to damage to some materials, crops, and marine organisms. The ozone layer protects the Earth against most UVB coming from the sun. Does the ozone layer cool the Earth? The […]

Why do hurricanes only form in the summer? Tropical cyclones in the Atlantic Basin are most numerous during late summer and early autumn because that is the time of year when the two most important ingredients needed for their formation — warm ocean waters (80 degrees or higher) and weak vertical wind shear (little change […]