You are hiking with a friend and reach the peak of a mountain after a long climb. On your climb upward, you had a clear trail with a little grass and small shrubs along the way. But looking down the other side, you see lush vegetation and many broadleaf
trees farther down the slope. Your friend wonders why there is such a big difference. What explanation can you offer your friend?
What will be an ideal response?
You're seeing a rain shadow effect. Air drops its moisture on the way up the other side of the mountain, and the air may even take away moisture on the way down the side you just climbed.
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The cyanobacterium Trichodesmium ________.
A. fixes a significant amount of N2 in oceanic environments B. uses nitrite as a source of nitrogen C. is a spherical organism D. fixes N2 during the day
The plant hormone ____ trigger plant responses to environmental stresses such as cold snaps, high salinity, and
drought.
a. abscisic acid b. cytokinin c. oligosaccharin d. jasmonate e. ethylene
Describe the structure of a mitochondrion and relate to ATP production. What will be an ideal response?
The distinction between cytochrome c of chickens and humans versus chickens and ducks was a difference determined by
A. sequencing of mtDNA. B. sequencing of rDNA. C. DNA-DNA hybridization. D. sequencing of amino acids. E. immuno-rejection of antibodies.