What is apoptosis?
a. the proliferation of cytotoxic t-cells.
b. a protein molecule that forms a pore in the membranes of infected cells.
c. the process of programmed cell death.
d. the receptor on a cytotoxic t-cell that recognizes mhc molecules.

c.The process of programmed cell death.

Explanation:

Apoptosis is a kind of programmed cell death process. This can be seen in multicellular organisms. This involves the biochemical changes in the body of the organism which lead to death of cells. The changes associated in the cell during this condition includes the cell shrinkage, blebbing, condensation of the chromatin, nuclear fragmentation, decay in mRNA, and DNA fragmentation.

mammal

explanation:

there are mainly three domains in biological classification namely; archaea, bacteria, and eukarya.

archaea includes all the prokaryotic cells which are characterized by their lipid membranes. they have branched hydrocarbon which is attached to glycerol through an ether linkage.

bacteria includes all the prokaryotic cells, the cell membrane of which are made up of the unbranched fatty acid chain. in addition, they are attached to glycerol through an ester bond.

eukarya includes all the eukaryotic cells, that is, the cells contain a nucleus and other membrane-bound cell organelles.

they can be autotrophic as well as heterotrophic, unicellular as well as multicellular

they include kingdoms like protista, plantae, animalia, fungi et cetera.

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explanation: