Env-201 Exam 2 Questions & Answers
2023/2024
What are fossils? - ANSWER-preserved remains of ancient organisms; evidence of very ancient past life
What conditions favor fossil formation? - ANSWER-- special material (amber)
- tar pits
- frozen env
- deserts
- covered in bodies of water w/ silt
What body parts are msot likely to fossilize? - ANSWER-Bones, exoskeleton, teeth, scales, shells, "hard
parts"
What is a "living fossil"? - ANSWER-Species first discovered as a fossil and believed extinct then later
found living; or a close relative that has remained unchanged from geological times
When did life first appear? - ANSWER-abt 4 billion years ago
When did the first large single-celled organisms appear? - ANSWER-abt 1.5 billion years ago
When did the first multicellular organisms appear? - ANSWER-abt 800 million years ago
When did the "Cambrian Explosion" occur? What is it? - ANSWER-Abt 500 million years ago
It's when most organisms / major animal groups started to appear in the fossil record
How old are Homo sapiens? - ANSWER-abt 2 million years old
, Name each geological period in order. - ANSWER-Periods:
1. Cambrian. Conny
2. Ordovician. Once
3. Silurian. Said Paleozoic Era
4. Devonian. Don't
5. Carboniferous. Chew
6. Permian. Pepper
7. Triassic. That's
8. Jurassic. Just Mesozoic Era
9. Cretaceous. Crazy
10. Tertiary. Too
11. Quaternary. Quirky Cenozoic Era
What period did each event occur?
1. First vertebrates (jawless fish)
2. First land plants
3. First fish with jaws (bony fish)
4. First amphibians
5. First reptiles
6. First mammals
7. First birds
8. Extinction of dinosaurs
9. First members of genus Homo - ANSWER-1. Cambrian
2. Silurian
3. Ordovician
2023/2024
What are fossils? - ANSWER-preserved remains of ancient organisms; evidence of very ancient past life
What conditions favor fossil formation? - ANSWER-- special material (amber)
- tar pits
- frozen env
- deserts
- covered in bodies of water w/ silt
What body parts are msot likely to fossilize? - ANSWER-Bones, exoskeleton, teeth, scales, shells, "hard
parts"
What is a "living fossil"? - ANSWER-Species first discovered as a fossil and believed extinct then later
found living; or a close relative that has remained unchanged from geological times
When did life first appear? - ANSWER-abt 4 billion years ago
When did the first large single-celled organisms appear? - ANSWER-abt 1.5 billion years ago
When did the first multicellular organisms appear? - ANSWER-abt 800 million years ago
When did the "Cambrian Explosion" occur? What is it? - ANSWER-Abt 500 million years ago
It's when most organisms / major animal groups started to appear in the fossil record
How old are Homo sapiens? - ANSWER-abt 2 million years old
, Name each geological period in order. - ANSWER-Periods:
1. Cambrian. Conny
2. Ordovician. Once
3. Silurian. Said Paleozoic Era
4. Devonian. Don't
5. Carboniferous. Chew
6. Permian. Pepper
7. Triassic. That's
8. Jurassic. Just Mesozoic Era
9. Cretaceous. Crazy
10. Tertiary. Too
11. Quaternary. Quirky Cenozoic Era
What period did each event occur?
1. First vertebrates (jawless fish)
2. First land plants
3. First fish with jaws (bony fish)
4. First amphibians
5. First reptiles
6. First mammals
7. First birds
8. Extinction of dinosaurs
9. First members of genus Homo - ANSWER-1. Cambrian
2. Silurian
3. Ordovician
