Page 210 - Science Course 3 (Book 1)

Mo5-L3b: Why Traits Change?

Mo5-L3b Why Traits Change? Conservation Biology
a branch of biology that studies why many species
are in trouble and what can be done to save them.
KEY CONCEPTS:
1. Why do traits change over time?

Vocabulary A-Z

Let us learn some vocabulary

Evolution
change over time.

ray-finned dinosaurs
Sharks fishes amphibians primates carnivores crocodiles & birds

Hair Pre-orbital fenestra

amniotic egg
four limbs
bony skeleton
vertebrae

Extinction
event that occurs when the last individual organism
of a species dies.

Permian Dinosaur
Extinction Extinction

Tyrannosaurus
Rex

Dimetrodon
Brachiosaurus
Ammonite

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