Antigens areproteins released during an inflammatory response. foreign molecules that trigger the generation of antibodies. foreign molecules that become embedded in b cell membranes. proteins found in the blood that cause foreign blood cells to clump. proteins that consist of two light and two heavy polypeptide chains.

The right answer is- foreign molecules that trigger the generation of antibodies.

Explanation:

Antigens are the foreign molecules/substance that when enters into the body initiate an immune response against it. Antigen has antigenic determinants or epitopes on its surface which interacts with receptors present on lymphocytes.  

Then these lymphocytes (B lymphocytes) differentiates into memory B cells and plasma B cell. Plasma B cells secrete antibodies against the antigen which helps in destroying the antigen by making its phagocytosis by phagocytes or by activating the complement system.

Therefore foreign molecule that triggers antibody production by initiating immune response is called antigen.

the right answer is a. skin cells forming from sunlight.

the liver is an organ endowed with a fantastic ability to regenerate

. thus, if a hepatectomy (ablation) of 70% of the hepatic mass is performed in the rat, there is complete recovery in 7 to 10 days.

prokaryotes are beings that have existed since the existence of life on earth, and do not come from another realm.

ribosomes are organelles that exist naturally in eukaryotes, either in free form or attached to the endoplasmic reticulum.

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it's the cell cycle, but cytokines is when the cell divides.

theres 3 stages interphase,mitosis,and cytokines.

interphase prepares the cell for division.

mitosis is the process of dividing the cell,it has 4 parts interphase,anaphase,metaphase,and telophase.

lastly there's cytokines,that's when the cell divides into 2 daughter cells