Question

1. complete the following chart by identifying the era and period when the life forms first appeared.

life forms	era	period
earliest mammals
earliest reptiles
earliest flowering plants
earliest humans
earliest dinosaurs

Explanation:

Each life form is matched to its geologic era and period based on paleontological and geochronological evidence, which documents the first appearance of these organisms in the fossil record.

Answer:

Life Forms	Era	Period
Earliest mammals	Mesozoic	Triassic
Earliest reptiles	Paleozoic	Carboniferous
Earliest flowering plants	Mesozoic	Jurassic
Earliest humans	Cenozoic	Neogene (Pliocene)
Earliest dinosaurs	Mesozoic	Triassic