Why are there always more members on the lower trophic levels than the higher trophic levels?
as energy moves from one trophic level to the next, more and more energy is available for the next level limiting the number on the next level.
the members of the lower trophic levels are always small in size so there can be more of them.
as energy moves from one trophic level to the next, less and less energy is available for the next level limiting the number on the next level.
the members of the lower trophic levels pass on all of their energy to the next trophic level.

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.

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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