Put the fossils in order from earliest (oldest =1) to most recent (youngest =7)

Biology Homework Help: Questions and Answers: Put the fossils in order from earliest (oldest =1) to most recent (youngest =7)

Answer:

To arrange the fossils from the earliest (oldest) to the most recent (youngest), we need to place each in its proper geological context.

Lets breakdown- Step by Step Answering:

1. Trilobite (Oldest)

Era: Paleozoic Era
Period: Cambrian to Permian
Age: Around 521 to 252 million years ago
Trilobites are one of the earliest-known groups of arthropods, common in the oceans during the Paleozoic.

2. Synapsid

Era: Paleozoic Era
Period: Carboniferous to Permian
Age: Around 320 to 250 million years ago
Synapsids are early amniotes that eventually evolved into mammals. Dimetrodon is a famous example from this group.

3. Ptilophyllum

Era: Mesozoic Era
Period: Jurassic to Cretaceous
Age: Around 201 to 66 million years ago
Ptilophyllum is a type of fossil plant belonging to the Bennettitales, a group of ancient seed plants.

4. Triceratops

Era: Mesozoic Era
Period: Late Cretaceous
Age: Around 68 to 66 million years ago
Triceratops is a well-known herbivorous dinosaur that lived just before the mass extinction that wiped out most dinosaurs.

5.Archaeopteryx

Era: Mesozoic Era
Period: Late Jurassic
Age: Around 150 million years ago
Archaeopteryx is one of the earliest-known birds, showing both dinosaur-like and bird-like features.

6. Lucy (Australopithecus afarensis)

Era: Cenozoic Era
Period: Pliocene
Age: Around 3.2 million years ago
Lucy is a famous early hominid, providing evidence of bipedalism in our evolutionary history.

7. Skate (Most recent)

Era: Cenozoic Era
Period: Recent
Age: Still existing today
Skates are a group of cartilaginous fish that exist today, making them the most recent of the fossils listed.

Final Answer

Based on the above analysis, the correct order from oldest to youngest: