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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)
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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 shows birth 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 Superior It 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