Scientists may make many genetically identical copies of an organism called A. plasmids
B. hybrids
C. clones
D. mutants

C. Clones

Explanation:

Clone definition: An organism or cell, or group of organisms or cells, produced asexually from one ancestor or stock, to which they are genetically identical.

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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:

"do a testcross with a homozygous recessive plant."