The correct answer is (C) Erupting volcanoes release many toxic gases.
Air pollutants are gases that harms the environment and human health. Some air pollutants come from volcanic eruption are toxic( like sulphuric acid) and harm our health. Volcanic eruption produce soot and ash into the atmosphere , which reduces sunlight and lowers temperatures. Eruption also produce carbon dioxide, carbon monoxide and other polluting gases
Some other examples of natural air pollutants are:
1. Radon is a radioactive gas that seeps from the ground in some areas, and fog and mist are both dense water vapor at ground level that obscures vision. 2. Ozone, a chemical formed naturally by the action of sunlight on oxygen, is a pollutant at ground level but beneficial in the upper atmosphere. It damages plants and causes breathing problem in the lower atmosphere.
Answer:D
Explanation:All things are made up of atoms but only living things are made of cells.
The two main distinctions between East Siberian greenish warbler and West Siberian greenish warbler is; 1. Their plumage patterns.
2. The wing bars which are used for communication.
West Siberian greenish warblers have a botanical name which they are referred as P. t. viridanus while East Siberian greenish warblers their botanical name is P. t. Plumbeitarsus. Plumbeitarsus have two wing bars while viridanus have one wing bar.
Their southern ring gradually changes the plumage patterns. The male greenish warblers are very good in singing to defend their territories and also to attract female ones.
Production of urine
Explanation:
The three major steps in urine formation in the urinary system are – glomerular filtration,reabsorption and secretion – all of which results in removal of waste and excessive water from the body.
Kidneys are the main organs of the urinary system which takes part in the formation of urine. The kidneys are supplied by the renal arteries and capillaries. Each kidney consist numerous functional units called nephrons. Each nephron has a renal corpuscular and a tubular structure.
The renal corpuscle holds the Bowman’s capsule which contains the tuft of blood capillaries called the glomerulus. Glomerular filtration of blood plasma flowing in its capillary systems filters filterable components of blood like water and smaller solute particles leaving behind non-filterable blood cells, large proteins, etc. The filtered components gets collected in the glomerulus and forms the glomerular filtrate.
This filtrate then travels through the tubular structure – convoluted tubule and Loop of Henle, where reabsorption of water and nutrient ions takes place.
The remaining waste ions, and hydrogen ions are then collected in the collecting tubule. This is secretion of urine which then passes to the urinary bladder through the ureters.