Which Has the Larger Light-Gathering Power

question 4

Multiple Choice

Which has the larger light-gathering power?

• A) A telescope of 5 cm diameter and focal length of 50 cm.
• B) A telescope of 6 cm diameter and focal length of 100 cm.
• C) A telescope of 2 cm diameter and focal length of 100 cm.
• D) A telescope of 3 cm diameter and focal length of 75 cm.
• E) Both b and c since they have the same focal length

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Definitions:

Mycorrhizae

Symbiotic associations between fungi and the roots of plants, improving nutrient and water uptake.

Epiphytes

Plants that grow on other plants for physical support but do not extract nutrients from their hosts, thus not parasitic.

Species Richness

A measure of the number of different species represented in an ecological community, landscape or region.

Disturbance Hypothesis

posits that disturbances in an ecosystem can create opportunities for new species to colonize, thus affecting biodiversity.