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Low levels of dissolved salts characterise the freshwater biomes. The salt content of fresh water is about 0.005 percent. The freshwater biomes consist of inland bodies of standing water like lakes, reservoirs, ponds and wetlands as well as the flowing waters of the streams and rivers. Their nature does not depend as much on global climate, but on the individual site where they occur.
A lake or a body of standing water can be divided into three zones according to penetration of sunlight in the water body i.e., littoral , limnetic and profundal. Each of these have their own physico -chemical features and characteristic array of living organisms.
The littoral zone is the area where light penetrates to the bottom. Aquatic life in the littoral zone consists of free floating and rooted plants, many aquatic insects, snails, amphibians, fish, turtles and water birds.
Congenital Syphilis A positive serological test for syphilis in a newborn without stigmata of syphilis may be due either to passive transfer of maternal antibodies or to prena
Define the elements that affects the Fitness? Fitness varies from a person to person. It is influenced by age, sex, heredity, personal habits, exercise and eating practices. Th
How is the concept of chromosome related to the concept of the gene? A chromosome is a DNA molecule and chromosome may contain several different genes and as well DNA portions
Explain about the supply curve or supply schedule. The supply curve or schedule shows the total quantity of a good or a service supplied within aggregate, by whole sellers or f
Explain noncompetitive inhibitor A noncompetitive inhibitor can combine with either the free enzyme or the enzyme- substrate complex, interfering both. The most common ty
Explain Membrane Filtration Technique? Another method used for determining the bacterial number is the filtration technique. The margain figure illustrates the membrane filter
Hormone s . The thyroid gland secretes following hormones. Thyroxine (tetraiodothyronine or T 4 )' and tri-iodothyronine or T 3 are secreted by the thyroid follicular cells.
Explain why it is essential that muscle cells, during anaerobic respiration, convert pyruvic acid (pyruvate) into lactic acid, even though the conversion results in an accumulation
function of epithelial tissue
Q. What is the relation between secretion of parathormone and the calcium blood level? The parathormone increases the calcium blood level since it stimulates the resorption (re
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