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Q. What are blood stem cells?
Stem cells are undifferentiated cells able to differentiate into other kinds of specialized cells.
The stem cells of the bone marrow originate the differentiated blood cells According to stimulus from specific growth factors the stem cells are turned into red blood cells, megakaryocytes and leukocytes (cells that form platelets). Research shows that stem cells of the bone marrow can also differentiate into muscle, hepatic cells and nervous.
A large leaf on a plant in bright sunshine evaporates 5 grams of water per hour. Cooling the leaf through evaporation in this manner enables the plant to eliminate heat energy at t
What is the valve that separates the aorta from the heart? What is the importance of that valve? The valve among the left ventricle and the aorta is the aortic valve. The aorti
Phylum Mollusca (47,000 species) The segmentation and coelom may not exist. Diversification through modifications of head, foot; mantle and 'radula for feeding. .Visceralorgans
In addition, pregnancy or constipation may worsen GERD by increasing intra-abdominal pressure. Secondary causes of GERD include reflux caused by acid hypersecretory states, connec
why mung beans has no endosperm while castor bean and maize seed has?
Determine the importance of Calcium in soils Calcium in soils is usually abundant except in acid soils, which occur in humid areas due to excessive leaching. Deficiency of calc
what is impotence?
Sources of vitamin C It is found in many of the natural foods like fresh citrus fruits like limes, lemons and oranges are rich sources of vitamin C. The best and the chea
The cell membrane is a slim semi-permeable membrane which surroundings the cytoplasm of a cell. Membrane function is to defend the integrity of the interior of the cell by allowing
What are the functions of the osseous tissue? The major functions of the osseous tissue are: to give structural rigidity to the body and to delineate the spatial positioning of
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