The concentration of ____________________ is close to 21 percent (by volume) in the upper stratosphere (the same concentration as in the trophosphere), but without proper breathing apparatus you would not be able to survive there
Fill in the blank with correct word.
ANSWER: ?oxygen
Environmental & Atmospheric Sciences
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The San Andreas Fault is a typical example of this type of plate boundary
A) transform B) subduction C) divergence D) convergence E) none of the answer choices are correct.
Environmental & Atmospheric Sciences
Toxicants that cause harm by triggering overactivation of the immune system are called ________.
a. neurotoxins b. teratogens c. allergens d. antibiotics
Environmental & Atmospheric Sciences
Which is the primary method of obtaining water by desert-dwelling kangaroo rats?
A. the seeds they eat B. directly from streams C. from abandoned wells D. absorb moisture through their skin
Environmental & Atmospheric Sciences
Why is it usually difficult to maintain productive agriculture year after year in a cleared area of tropical rainforest?
What will be an ideal response?
Environmental & Atmospheric Sciences