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Lecture

Science and Society I


Department
Science
Course Code
SCIE 1P50
Professor
Caroline Starrs

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1Dr. Caroline Starrs
Science 1P50 Lecture October 12/11
Parasitism
Parasite benefits, host is harm
Ectoparasities & endoparasites
Species Interactions
Predation
Consumption of one species by another
Coevolution
“arms race”
Physical and chemical changes to defend themselves
Avoiding predators
Mechanical defenses
Quills, shells
Social Groups
Camouflage
Protective chemicals
Snakes, toads
Often brightly coloured
Keystone Species
Crucial to maintain an ecosystem
Loss affects many others
Water
Water and the hydrologic cycle
Water’s distribution on Earth
Fresh water ecosystems
Use and alteration of freshwater systems
Problems of water supply and solutions
Problems of water quality and solutions
How wastewater is treated
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