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What is pollination? What are the main forms of pollination?
The process in which pollen grains (the male gametophytes of phanerogamic plants) reach the female gametophyte is known as pollination.
Characteristics of the flowers of every plant species relate to the type of pollination used by the plant. Colored flowers are specialized in bird and insect attraction; nocturnal flowers normally are white and perfumed, a lot of specialized in pollination by bats; the nectar is also a specialization to attract pollinator animals; flowers that make an exaggerated amount of pollen often use the wind as pollinator; the position of anthers more external or internal next to the nectar is a way to facilitate the pollen dissemination respectively by the wind or by animals.
Cyanobacteria carry out photosynthesis using two photosystems as in green plants. Furthermore, other photosynthetic bacteria, like as the purple photosynthetic bacterium Rhodospiri
What are Tannins? Long known for their inhibitory effects on iron absorption, recent research indicates that tannins do have beneficial effects. Tannins are compounds of high m
Q. How are inhalation and expiration carried out? The diaphragm exclusive of mammals and the intercostals muscles can contract or relax varying the volume of the thorax the com
Q. What is the second polar body? After termination of the second meiotic division of the oocyte II two cells are generated: the second polar body and the egg cell proper. The
How are lipids used as an energy source by the organism? Carbohydrates are the major energy source for aerobic cell respiration. In the absence or deficiency of such substances
Stretch Receptors Stretch receptors able of perception of muscle tension or stretch are distributed in the connective tissue related with muscles of many groups of animals. Th
How to Planning the Daily Diet for Underweight Patients? As mentioned above you need to add calories gradually to the diet. A practical way of doing so is to take the present i
Q. Chronic exposure of Cadmium? An increase in the soil cadmium content due to soil pollution by industrial wastes, burning of coal, fossil fuels, sewage sludge, medical and
what is virus ?? what is classidication , uses , disease of viruses ? what are types of virus ?
Endodontics principles and practice According to American association of endodontic, retreatment defined as:A procedure to remove root canal filling materials from the tooth vi
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