Too much or too little of any physical or chemical factor can prevent the growth of a population, even if all other factors are at or near the optimum conditions. What is this ecological principle?

A. tolerance
B. limiting factor
C. resilience
D. persistence
E. optimal level


Answer: B

Environmental & Atmospheric Sciences

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Over the past 40 years, air quality has gotten substantially worse in many of the major cities of North America.

Answer the following statement true (T) or false (F)

Environmental & Atmospheric Sciences

Uniformitarianism is the assumption that ____

a. principles of one branch of science apply to other branches of science b. catastrophic events don’t impact Earth processes c. younger sedimentary rocks are at the top of rock sequences d. current rates of atmospheric warming are unsustainable e. present-day geological processes also occurred in the past

Environmental & Atmospheric Sciences

Indian pipe, a flowering plant, lacks chlorophyll and is not able to do photosynthesis. It obtains food as:

A. a mutualistic organism B. a host C. a commensal organism D. a parasite E. More than one of these choices is correct.

Environmental & Atmospheric Sciences

What does "distance decay" mean?

What will be an ideal response?

Environmental & Atmospheric Sciences