Examlex
A slide projector needs to focus the image of a 24.0-mm × 36.0-mm slide onto a square
screen 1.50 m on each side. You want to fill the screen as completely as possible without
any of the image falling beyond the screen. Due to space constraints in the projector, the
slide must be placed 10.5 cm from the lens.
(a) What magnification does the projector produce?
(b) How far from the lens should the screen be placed?
(c) What focal length projector lens is needed?
Indicator Species
Organisms used as a sign or measure of the environmental conditions or changes in an ecosystem because of their sensitivity to such conditions.
Endemic Species
Species that are native to a specific geographical area and are not naturally found anywhere else.
Keystone Species
A species crucial for the stability of an ecological community, influencing numerous other organisms within the ecosystem.
Coevolution
The process by which two or more species evolve in response to each other, often developing mutualistic or predator-prey relationships.
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