investigation 8 2b

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What factors determine the rate at which a population can increase in size? Reproductive Reproductive Potential Potential

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Page 1: Investigation 8 2b

What factors determine the rate at

which a population can increase in size?

Reproductive Reproductive PotentialPotential

Page 2: Investigation 8 2b
Page 3: Investigation 8 2b

What might happen to the populations of

walkingsticks and birds in the bush environment over

time?

Page 4: Investigation 8 2b

Limiting FactorsLimiting Factors•Besides predation by birds, what other factors might limit the walkingstick population?

•Are these factors biotic or abiotic?

Page 5: Investigation 8 2b

Migrating Birds

Page 6: Investigation 8 2b

Webbed Feet

Page 7: Investigation 8 2b

Swimming Upstream

Page 8: Investigation 8 2b

Long Legs

Page 9: Investigation 8 2b

Nocturnal Hunting

Page 10: Investigation 8 2b

How would you describe these organisms?

Page 11: Investigation 8 2b

FEATURE• Any general

structure, characteristic, or behavior of an organism– Wings, fur, pattern,

color and migration– ALL have this

Page 12: Investigation 8 2b

TRAIT• The specific

expression of a feature in an individual– Wing length, number

of spots, thickness of fur, intensity of color, timing of migration

– SOME have this

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VARIATION• When there are several traits for the

same feature in a population– One example are the 3 different colors

exhibited by walking sticks

• Allows a population to survive even if the environment changes

Page 20: Investigation 8 2b

Reflection page 68

Draw and color an illustration of an organism or organisms and identify

the feature, trait and variation included in your

picture.