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What is Specific defence mechanism
Specific: These relate to specialized cells located throughout the body which respond to invasion of foreign materials/microorganisms such as bacteria, virus, fungi or unwanted substances produced or entering the body. Some specific cells are fixed in tissues such as thymus, lymph nodes, bone marrow, spleen, lymphoid tissue of the respiratory, gastrointestinal and genitourinary tract, kupffer cells of the liver and Peyer's patches of the small intestine.
Why are agricultural fields often less stable than natural communities in the similar area? Because agricultural fields usually having one species of crop plant, they have low
The chemicals responsible for imparting the sweetness, classic salt taste and bitter and sour taste are summarized herewith. A. Sweet Taste Sweetness is one of the most importa
What is root pressure? Root pressure is the pressure that forces water from the soil to be absorbed by the xylem of the root. It is because of the osmotic gradient among the i
Suppose you were presented with two 40X lenses to use on your microscope, lens A had a numerical aperture of 0.56 and lens B had a numerical aperture of 0.75. Which is best and why
Q. According to their morphology how bacteria are classified? Bacteria present different morphological patterns, a bacterium can be classified into bacillus, coccus, spirochete
Q. What do you mean by Congenital Long QT Syndrome? There is a rare group of young patients who suddenly pass out due to a spontaneous ventricular tachycardia and often have fa
You now want to express the gene in E coli, but unfortunately it has an intron in it that will not be processed out in bacteria, hence it must be removed. (a) Design P
Implantation : It is the process in which the blastocyst (developing zygote) is attached to the glandular uterine wall and then embedded in the wall of uterus. 1) In human bein
Do echinoderms present internal or external fecundation? Is there sex division among individuals? The fecundation in echinoderms is external; gametes are liberated in water whe
Blood from a donor is sterile and stored in a sealed bag, but it is still kept at 4°C. What is the advantage of keeping it at this low temperature? At 4 °C, enzyme activi
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