Which kingdom includes autotrophic and heterotrophic, unicellular and multicellular organisms?

Protista  Kingdom

Explanation:

Protista consists of simple eukaryotic organisms that are made up of a single cell or composed of group of similar cells that can sustain in any environment terrestial, moist , water, as parasites, etc.

Plant like protists such as algae are able to produce food of their own while heterotrophic species such as fungis (slime molds) feed on decaying dead organic matter.

Hence, kingdom protista  includes autotrophic and heterotrophic, unicellular and multicellular organisms.

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explanation:

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spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.