Competition for biotic resources can be illustrated by organisims fighting for a limited amount ofa) air to breatheb) water or drinkc) mates for breedingd) space for nesting2) which term refers to the ecological niche of many bacteria and fungi in an ecosystema) decomposerb) herbivorec) producerd) scavenger

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he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?