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Is the epithelium vascularized? How do nutrients and oxygen reach the epithelium? Why is this feature a significant evolutionary acquisition?
Epithelia are not vascularized (capillaries do not directly reach their cells). The epithelium exchanges substances by dispersal with the connective tissue situated under it.
As the epithelia are not vascularized minuscule skin injuries or scratches that occur all the time do not trigger bleeding and do not expose the blood to contamination from external agents. This is an significant protective method discovered by evolution.
Promoters The promoter region contains the DNA sequences that allow the formation of the transcription initiation complex that give the specificity of expression. Promoters are
Enumerate about the Wisconsin Card Sorting Test Verbal memory, non verbal memory etc. are tested through the presentation of stimuli such as verbal learning test, selective rem
This process involves the regulation of the concentration of the body fluids through control of water content and salt content of the blood. If a person loses water from their bloo
Q. Of what subunits are ribosomes are made? Ribosomes are made of two subunits the small subunit and the large subunit. These subunits are made of proteins and ribosomic RNA (r
Directional or progressive selection is the mode of selection associated with environmental change. We said earlier that in an unchanging environment stabilising selection removes
Different types of stems (a) Monocots. Secure stems of various plants such as bamboo, sugar cane and corn. Cut every of the stems crosswise with a very sharp knife or razor bl
Define Functions of Protein? Each of the various proteins in the body serves a specific function in the maintenance of life. Any loss in body protein, in reality, means a loss
what is the job of the cell coat?
State the differences between the male gametes and the female gametes with regard to (a) their size; (b) their structure, (c) their relative numbers. (a
Q. Optional use values of biodiversity? Optional values are associated with potential use in the future. Accordingly one opts to conserve biodiversity based on the hope that it
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