Answer: Acquired Active Immune Response System
Explanation:
Vaccines are substances that are prepared from the causative agent of a disease or its synthetic substitute, which is treated to mimic the actual antigen of the disease. This artificial antigen of the disease, thereby stimulates the production of antibodies that helps in fighting the disease and also provides immunity against the disease in the body.
A primary response system is stimulated in the presence of the vaccine, which acts as an antigen. In this way, an artificially acquired active immune response system is created naturally using vaccines.
Answer:
Thymus
Explanation:
T cells mature in the thymus
The answer is C. a double helix
Answer:
b. Immnofluorescence
Explanation:
Immunofluorescence involves the reaction of a fluorescently labelled antibody to an expressed gene or protein making it specific. A microscope is used to locate the expressed gene via the fluorescent dye activated by light of a certain wavelength. It is usually done to analyze intact cells or tissue therefore it is easier to localize the gene expression.
The answer is (b.) ecosystem. An ecosystem is all living organism in an area functioning together with nonliving factors of the environment. An Ecosystem is a community of the living organism that includes the producers, the consumers, and the decomposers.
