Q7. After exposure to a bioaccumulating toxin for long period of time, which type of organism would you expect

to have the highest toxin concentration?

O Fish

Zooplankton

Pitoplankton

All these would have about the same toxin concentration,

The correct answer is "Fish".

Explanation:

A bioaccumulating toxin will have its maximum concentration on species that live longer, because the toxin gradually accumulates into the organism. In this case, fish will have the highest toxin concentration because it lives longer than zooplankton or phytoplankton. Furthermore, fish is at a higher position in the food chain, therefore it will feed from other organisms that are potentially exposed to the toxin.

format change of dna.  

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: