The diagram illustrates the process of creating genetically modified corn.
a. what occurs at step 4 in the diagram?
b. the foreign dna is placed in a mechanical vector for cloning.
c. the foreign dna is placed in a biological vector for cloning.
d. the foreign dna is inserted into the host cell genome.
e. the foreign dna is isolated by restriction enzymes.

the one that occur is : C. the foreign DNA is placed in a biological vector for cloning. In cloning process,we separate a DNA from one cell and transplant it into the eggs of another organism to be bred. Most experiments were conducted using sheep. When the scientist transplant a DNA from a sheep to another sheep (which is considered a biological vector)

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.