An anaphylactic reaction occurs because of a/an toxin-exotoxin interaction. sympathetic-parasympathetic interaction. antigen-antibody interaction. alpha-beta interaction.

antigen-antibody interaction.

Explanation:

An anaphylactic reaction also known as anaphylaxis can be defined as a severe short-term allergic reaction that usually occurs within seconds or minutes after being exposed to an allergen.

Basically, an anaphylactic reaction is potentially life threatening i.e it is capable of causing death to patients and as such a medical diagnosis is required and it must be treated by a medical professional (expert) immediately after exposure to an allergen.

Hence, an anaphylactic reaction occurs because of an antigen-antibody interaction.

An epinephrine (adrenaline) may be quickly administered (given) to the patient by the medical professional.

Some of the symptoms of an anaphylactic reaction are;

I. Running nose and sneezing.

II. Skin rash.

III. Dizziness, fainting, vomiting, paleness, diarrhea etc.

The correct option is A.

Thomas Hunt Morgan contributed to scientific knowledge by studying fruit flies and by discovering through his study that certain traits are linked to the X chromosomes. He discovered this fact, when he noticed that a certain mutation that affect fruit flies' eye color was inherited differently by male and female flies. Based on the pattern of inheritance, Thomas concluded that the gene that is responsible for the eye color is located on the X chromosome.