Answer:
The birds are oviparous in nature and produces eggs that are hatched later by the parent. the egg hatching require proper heat and protection from the external enemy.
The egg shell is the hard covering of the egg of the bird that is made of the calcium. The egg shell protect the egg from the external environment. The calcium layer for the egg shell formation is obtained by the oseteoclast property of the cells.
Answer:
The answer is D.
Explanation:
Among the given options in the question, the fitting function for the motor division of the nervous system is sending signals to muscles. The nervous systems' motor division is used to control muscles, organs and excretions of glands in the body. The functions described in the other option are for the somatic division of the nervous system. So the answer is D.
I hope this answer 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.
Answer:
i would choose d as the correct answer
hope this helps have a good day
