Page 115 - Science Course 3 (Book 1)

Mo3-L2b: How Do Living Organisms Adapt?

Key Concept Mo3-L2b How Do Living Organisms Adapt?

What is Darwin’s Theory of Evolution?
KEY CONCEPTS:
What role do variations have in the theory of 1. How do variations lead to adaptations?
evolution by natural selection?

Vocabulary A-Z

Let us learn some vocabulary

Adaptation
an inherited trait that increases an organism’s
chance of surviving and reproducing in a particular
environment.
Fringed flight feathers that muffle sound of air passing
through their
feathers for
silent flight.

Large Eyes set forward
on their heads for great dept
perception while hunting

Their necks have a large turning radius for following
prey as the move.

Camouflage
an adaptation that enables a species to blend in with
its environment.

SUMMARY

What is Darwin’s Theory of Evolution?

Charles Darwin developed his theory of
evolution partly by observing organisms in
their natural environment. Mimicry

Natural selection occurs when organisms an adaptation in which one species looks like
with certain variations live longer, compete another species.
better, and reproduce more often than
organisms that do not have the variations.

Eastern Coral Snake Scarlet King Snake
(venomous ) (non-venomous )

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