Even though seawater continues to dissolve minerals from rocks and new minerals are added from the interior of the earth, the salinity of the oceans is not increasing over time. Explain 3 reasons that cause this
What will be an ideal response?
The ocean's salinity is in equilibrium. Salts that are added to the oceans are removed by processes such as adsorption and other sedimentation processes, removal by sea spray, and removal by incorporation into living organisms.
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The maintenance of a constant environment in a cell is called __________.
A. active transport B. homeostasis C. gene expression D. translation
Experiments with ribbon worms and planaria have shown that
A. it is easy to hybridize the two species in nature. B. Pax6-related genes are not always required for eye regeneration. C. the DNA of each is sufficiently similar that they can be hybridized in a lab setting. D. their eyes are examples of convergent evolution.
Which of the following statements about ecological
succession is false? a. A disturbed area within a community may recover quickly if improved soil remains. b. Pioneer species are the start of community structure. c. The wastes and remains of early colonizers favor the survival of new species. d. Secondary succession occurs on a new volcanic island. e. Later successional species outcompete earlier species.
The primary difference between the amino acids commonly found in proteins is in their:a
R or variable groups. b. number of potassium groups. c. number of phosphate groups. d. number of carbonyl groups. e. number of asymmetric carbons.