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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.
What term is used to describe the range of organisms in a habitat
Littoral and Benthic Zone Littoral Zone This is the shallow water zone, near the shore, where light penetrates to the bottom. Rooted plants can grow only in this region.
Which one of the following is an example of ex-situ conservation? 1. Wildlife sanctuary 2. Seed bank 3. Sacred groves 4. National park Seed bank
Define the Effect of Wernicke korsakoff syndrome? Besides occurring in infants, beriberi also occurs in adults with high carbohydrate intakes (mainly from milled rice) and with
plese help for an assignment of topic parasitic flat worms for a first year zoology student.
In an investigation to compare the rates at which starch is being broken down by an enzyme (a) what test is used (b) how do you know when the reaction
The gaseous pollutants can be controlled through the techniques of combustion, absorption adsorption and cold trapping. (a) Combustion: Though combustion is a major cause of i
Q. What are some examples of biological activities in which osmosis plays an significant role? Hemolysis destruction of red blood cells by entrance of water, the hydric regulat
Define Potential Health benefits from resistant starch? Like dietary fibre, RS can also play a potential role in helping to maintain or improve health of an individual. As you
Person X is a healthy human who has volunteered to take experimental drug Y. Person X has a normal dinner at 6 PM on April 1 and then does not eat for 12 hours. At 5 PM on A
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