Answer:
True
Explanation:
B cells are B lymphocytes and are one of the types of white blood cells. Their main role is in the acquired immune system in which they help in the humoral immune response of the body by the secretion of antibodies. The maturation of the B cells occurs in the bone marrow in mammals. But in birds, these cells mature in an organ named bursa of Fabricius which is a lymphoid organ in birds. These B cells were first isolated form the bursa of Fabricius of the birds.
The most common transfusion reaction, especially in patients lacking either IgA especially serum IgA, is the development of potentially severe hypersensitivity reactions or anaphylaxis. The most probable culprit is the presence of IgA in the transfused blood, because since the individual lacks IgA, then the IgA in the transfused blood is considered a foreign body triggering an allergic response.
The correct option is conscientiousness
<span>Conscientiousness is a big five personality
trait along with extraversion, agreeableness, openness, and neuroticism. Conscientiousness
implies a desire to do a task well and is about how an individual is careful,
thorough or vigilant and direct their impulses.</span>
Answer:
The correct answer is option - e. all of the above are useful traits.
Explanation:
A cloning vector is a small segment of DNA that can be established stably in an individual organism and able to internalize a foreign DNA for cloning purposes. The cloning vector could be taken from different organisms such as plasmid of a bacterium, or DNA from a virus. A cloning vector must possess some characteristics -
The cloning vector must be self-replicating ability in the host cells, it should be small in size with restriction site for the restriction endonuclease enzymes in it. The replication character of the vector should not interfere with the internalized DNA fragment. The presence of marker genes in the vector is also a property that is helpful in identifying of recombinant cells.
Thus, the correct answer is option - e. all of the above are useful traits.
Answer:
Animalia - multicellular, eukaryotic
Plantae - vacuolate eukaryotic cells, multicellular
Protista - unicellular and multicellular, eukaryotic
Fungi - decomposers, non-motile
Eubacteria - unicellular, prokaryotic
Archaebacteria - no peptidoglycan, glycoproteins and polysaccharides in cell walls.
Hope that helps. :)
