7.1 (2) An Epic Journey

• Biologie
• 9th Grade

What is the biological
definition for 'species'?

How did Darwin explain the variety in species of finches on the Galapagos Islands?

1. The different species all flew from the mainland
2. One island had a species, some flew to other islands and adapted there
3. All the islands had the same species which later adapted in different ways
4. The mainland had 1 species, some flew to the islands and adapted in different ways

Name a physical
adaptation of the finches

Why did each species of finch have a different physical adaptation?

1. Because the environment on each island is different
2. Because they get more food if they adapt
3. Because of accidental circumstances
4. Because they get more offspring if they adapt

What is meant by adaptation in biology?

1. The best-fitting individuals adapt to the environment.
2. A population consists mainly of best-fitting individuals.
3. A population changes when mostly best-fitting individuals pass on genes.
4. A population changes because only best-fitting individuals survive.

What is differential reproduction?

1. The best fitting individuals will have best-fitting babies.
2. The best-fitting individuals reproduce more.

A leaf insect evolved through
a type of adaptation called...

1. Structural adaptation
2. Natural selection
3. Mimicry
4. Physiological adaptation

A peacock's tail evolved through
a type of adaptation called...

1. Structural adaptation
2. Natural selection
3. Mimicry
4. Physiological adaptation

Super bacteria evolved through
a type of adaptation called...

1. Structural adaptation
2. Natural selection
3. Mimicry
4. Physiological adaptation

Watch the following video

Find 5 rules (or steps) on how

the process 

of evolution works.

So...

What are the 5 rules or steps??

The 5 rules or steps for evolution

1. The population has genetic variations
2. Some variations are favourable in the environment
3. More offspring are produced than can survive 
4. Those that survive the struggle (competition) have favourable (fitting) characteristics
5. A population will change over time

Name an
environmental
condition

How might a species of bears adapt
when their environment gets colder?

How might a species of finches adapt when
food can only be found deep inside tree trunks?

How might a species of foxes adapt
when their snowfields turn into a desert?

Beware of this misconception 

Who adapts???

The individual does not adapt.

Over time, the population does.

Worksheet

Natural Selection

Homework

Questions 

11a (not b)

16

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