Ch. 5 Test Review

Populations• Key Terms–Populations –Carrying capacity

Know the difference between the following: (p. 104-105)• Logistic Growth• Exponential Growth

Why is Human Pop. Growing so fast?

• Agricultural Technology• Medical advancements• Industrial Rev. (1700’s)

Which part showsbirth and death rates about equal?Where is growth 0?

Human Pop. (cont.)

•Better sanitation, hygiene and disease control have lowered the

DEATH RATE!!!

Which is a population? A- all the insects in Memphis, TN B- all the cats in LeMars, IA C- all the birds in Chicago,IL D- all the fish in Lake SuperiorIt must be an interbreeding group.

B

Milkweed plant & Monarch butterfly

• Make sure you know about the co-evolution relationship of these 2 organisms.• The poisonous plant helped the

caterpillar. How?

Factors that Affect Pop. size• Biotic- – LIVING– Ex. Prey

• Abiotic-– NONLIVING– Ex. Disease, weather

Predator/ Prey • Most animals are both predators and

prey.• Predators:–Hunt and kill their food

• Prey: –Are the food

Symbiosis• When 2 organisms live in close

association with each other.

• 3 Examples… Parasites Mutualism Commensalism

Herbivory p. 110 • Herbivores eat plants, but plant do try to

protect themselves sometimes.• Ex. Thorns, spines, bad tasting chemicals.• Monarch butterflies have evolved a way to

get around that problem.–Use the toxin in milkweeds in their own

defense.

Parasite/Host• Symbiotic

• Examples…–You come up with 3

Commensalism• Symbiotic• Examples…–You come up with 3

• Ex. Orchids use trees to get close to sunlight

Mutualism• Symbiotic• Examples…–You come up with 3

Niche• The ROLE an organism has in its

ecosystem.• Fundamental Niche-what is

could occupy• Realized Niche-what it really

does occupy