Darwin studied different types of

finches while visiting the Galapagos

Island.

All the birds were similar in size, color,

shape, and habitat (aspects) except they

had different beaks.

Darwin thought all finishes might come

from one ancestor

Variations that favor survival are more likely to be passed to the next generation.

Those variations do not favor survival are less like to be passed on to the next generation.

Variations can help a species live long enough to successfully reproduce.

Same thing also occur in plants.

Many plants are suited to live in particular climates.

• Darwin noticed that each species of finches was well

suited to its particular environment

• Each beak of finch enabled the finches to eat particular

seed or insect.

• Each beak type is called Variation or differences among

members of the same species.

• Differences are caused by change in an organism

genetic which is called Mutation

Cause

Mutation Disorder in organisms

DNA

VariationsChanges in organisms

genetic setup

Effect

Different

beaks in

finches

Enables

species to live

longer

Which enables

in reproduction

A variation that

favors survival

Pass the

traits to

offspring's

How are variations passed down through

generations?

QUESTION: Why do most organisms produce more off springs than survive in the environment

Answer: producing more offspring to ensure that at least a few will survive and reproduce

In nature organisms compete for natural resources such as food, water and space sunlight

Survival of fittest is another way to describe natural selection

Plant and animals have more offspring than their environments can support to ensure that enough will survive to carry the species into the future

Animals whose fur or skin color blend in with their environments are much likely to hide from or escape their predators than are more noticeable animals( camouflage)

In some species Vivid (strong)coloring can warn predator that an organism is dangerous, tasted bad , or is poisonous

What is another name for natural selection

Survival of fittest

How does variations help an organism survive in its environment

Organisms with a traits that are better suited for survival in environment, are more likely to reproduce and pass these traits to their offspring

How can an animal‘s coloring affect its chances of survival?

Colo

r

Camouflage in animals

Could make animal more noticeable

Helps it to attract and mate

Cause Effect

Antibiotic are medicines people take for diseases

Anti means against. Biotic means life

This medicine kills live bacteria

Q/ Why should people complete a course of anti biotic?

A/ The strongest bacteria take the longest time to be killed by anti biotic

Q/ What some process enable some bacteria to resist the anti biotic?

A/ Natural selection

Q/ What do you think might happen if more bacteria become resistance to antibiotic?

A/ New strong medicine will be needed

Science Grade 6

Mrs. Deema Anabosi