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Describe Splitting sequence of S2 ?
Even though the pulmonary valve closes at about 20 mm Hg and aortic valve at 100 mm Hg, the aortic closure occurs first as the impendence to forward flow is less in pulmonary circuit (pulmonary vascular resistance is about 1/10th of systematic vascular resistance). Also the elastic recoil of normal pulmonary artery is less than that of + aorta (hang out time).
Biological Nitrogen-Fixation The process by which molecular nitrogen (N 2 ) is reduced to ammonia (NH 3 ) is called nitrogen-fixation (N 2 -fixation). This is the most importa
The earth's environment has been composed in a way which sustains life on this planet. Through on process, the different constituents of the atmosphere are consumed and through the
To test the gas given off when seeds germinate Place some mustard seeds in a flask with some damp cotton wool, in the apparatus shown in the diagram, and permit them to germina
Arrange the following processes sequentially to define the translocation of food through sieve tubes. i. Unloading of sugar in sink cells (or cells of root). ii. Uptak
(a)State the law of independent assortment. (b )Using punnett square demonstrate the law of independent assortment in a dihybrid cross including two heterozygous parents.
Two chromosomes in a cell have identical length and centromere position yet are not homologous, what is different about them.
In what way do investigations build scientific knowledge?
What is the difference between the endocrine gland and the exocrine gland? Endocrine gland is a gland whose secretions (known as hormones) are collected by the blood and reach
What is excretion? Excretion in Physiology is the method of elimination of metabolic wastes and other toxic substances from the body.
Genic Type-Genetic basis of Sex Determination In some organisms, certain indepe~ident genes located on different chromosomes are responsible for sex determination. Most species
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