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Darwin while evolving the concept of natural selection laid emphasis on competition among individuals belonging to a species, that is intraspecific competition. Here the individuals compete for almost identical requirements from the environment. Competition between individuals belonging to different species, that is interspecific competition is also observed in nature. In the following subsection we shall discuss the essential differences between the two types of competition, and subsequently highlight the role of natural selection in evolving coadapted colnmunities of closely related species.
Megasporogenesis One of the nucellar cells situated subjacent to the epidermis differentiates into the primary archesporial cell. This cell is larger than the adjacent ce
Nitrogen Fixation As we have said before, atmospheric nitrogen cannot be used by plants or animals. It has to be first fixed. The term nitrogen fixation refers to the oxidatio
Explain in details Aerobic Respiration? The pyruvate produced in glycolysis is further broken down in most organisms. This process, called aerobic respiration, requires gaseou
note about water microbiology
In Chemical Reactions that have a large negative /\Go' a- the total amount of both reactants and products decreases b- the products are less stable than the reactants c- t
What are the hormones secreted by the adrenal medulla? What are their respective functions? The medullary portion of the adrenals secretes hormones of the catecholamine group:
Name and explain the mechanisms of heat loss that are contributing to Joel's feelings of coldness. Be sure to name ALL the mechanisms that are contributing!
Q. What are some signs and symptoms found in patients with hypothyroidism? In hypothyroidism the production and secretion of T3 and T4 are impaired. Since these thyroid hormone
How Water Balance Take Place in Human Body? The amount of fluid in the body is tightly controlled because imbalance can be devastating. In a normal individual, the maintenance
Subphylum Urochordata : (13,000 species, sea squirts) Notocord is dorally situated, nerve tube dorsally situated and is hollow, chordate characteristics seen mainly in bilatera
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