Infections generally result in an increase in the number of . 1)alveoli. 2) erythrocytes. 3)platelets. 4)leukocytes

Leukocytes.

Explanation:

The infection can occur in the body by the pathogens or by an injury. The immune cells of the body against these infection and protect the individual's body.

The leukocytes are the main immune cells present in the body that plays a role in providing immunity. The number of leukocytes increases in case of the infection.

Thus, the correct answer is option (4).

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.

read more on -

explanation: