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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.
Embryonic Development The embryonic stage extends from the second week by the 8th week and is charactrised by formation of placenta, the development of internal organs and ap
GRE stands for the Glucocorticoid Response Element: The binding site in a promoter to which the activated glucocorticoid receptor can be bind. The glucocorticoid receptor is signi
what is mean by fisson
What is the function of the skin in humans? The skin is the external covering of the body. In humans its major functions are protection, perception of information from the envi
In which areas of the globe is gymnosperm abundance noteworthy? These plants are the typical vegetation of cold regions as the taiga, or boreal forest, of the northern hemisph
Name of the structures you would expect to find in the dermis. In the dermis you would expect to search sensory nerve endings, nerve fibres, capillaries, arterioles and venules
The fundamental contractile unit is the sarcomere. Each muscle cell apart from the nucleus, mitochondria and other structures contains parallel fibrils. Sarcomere is a subunit of t
Neutral fat & oils These are triglyceryde compounds. 1 molecule of neutral fat consists of 1 molecule of glycerole and 3 molecule of fatty acids. 3 ester bo
Q What are the retroviruses? How do they reproduce and what is the role of the enzyme reverse transcriptase? Retroviruses are viruses whose genetic material is RNA, HIV and the
Define the Physiological Changes in Infants? Let us briefly understand some of these changes as they bear important relationship to the care and development of infants. Some o
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