Plants, Animals, and bacteria
The answer is D. the way organisms grow and develop
D- horsetail
I hope that helps
During the initial exposure to the allergen, contact is made with B cells, these B cells differentiate and produce IgE antibody. The IgE antibodies which works against the allergens are released into the blood stream where they binds to Fc receptors which are located on mast cells and basophils. Now, the mast cells has become sensitized and they will wait patiently for the second exposure. When contact with the allergen is made the second time, the allergen becomes attached to the IgE present on the mast cells and this result in degranulation which trigger a lot of allergic responses.
B. half of the boys are normal and half of the boys are color-blind. ( boys are most likely to get color blond than girls, the girls can also be carrier like the mother)
