Animals: Structure and Function

Groups of organs with specific structures and functions work together as systems, which interact with other systems in the body.
The development and uses of technology to maintain human health are based, in part, on the changing needs of society.

Thursday, September 18, 2014

Limiting Factors on Ecosystems

In today's class we discussed how each organism has an optimal range in which it thrives, and a tolerance range in which it survives. Grade 9s understand that this refers to biotic limiting factors such as light, nutrients, temperature, water, etc. Students enjoyed viewing slides that depict various biotic species-species interactions such as predation, parasitism, mutualism, commensalism, and competition.

Homework & Reminders:
Complete questions 1, 2, 3, 4, 7, 8 on p. 55
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