Grade 11 Bio Exam Review

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  • Topic: Ecology, Ecosystem, Plant
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  • Published : January 11, 2012
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Science Review Sheet: Sustainable Ecosystems

1. Carrying Capacity: The carrying capacity of a biological species in an environment is the population size of the species that the environment can sustain indefinitely, given the food, habitat, water and other necessities available in the environment. In population biology, carrying capacity is defined as the environment's maximal load, which is different from the concept of population equilibrium. Population size decreases above carrying capacity due to a range of factors depending on the species concerned, but can include insufficient space, food supply, or sunlight. The carrying capacity of an environment may vary for different species and may change over time due to a variety of factors, including: food availability, water supply, environmental conditions and living space.

2. Lithosphere: -Solid outer shell of the earth
-Made of rocks and minerals
-50-150km thick
Hydrosphere: all of the in solid, liquid and gas from on, above and below earth’s surface. 97% of earth’s water found in oceans Biosphere: the zone around earth where life can exist.
Atmosphere: -the layer of gases surrounding the earth
Consists of: 78% nitrogen, 21% oxygen, 1% (water vapour, CO, argon)

3. I couldn’t fiind anything in thee entiree book forr thiis question -.-

4. Primary producers are those organisms in an ecosystem that produce biomass from inorganic compounds (autotrophs). (ex: Plants and bacteria)
Primary Consumer: An herbivore is an animal that is adapted to eat plants. (ex. Butterfly, rabbit, squirrel)

Secondary Consumer: a consumer that gets its energy from other consumers. These are often called carnivores (ex. snake, frog, bird)

Tertiary consumer: a high-level consumer, which is usually the top predator in an ecosystem and/or food chain (a carnivore that feeds on other carnivores) (ex. fox, eagle)

5. Measuring Biodiversity: Often indicator species are used as a way of measuring biodiversity....
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