What is a species that affects many other organisms in an ecosystem called?
a. critical species
b. impactful species
c. keystone species
d. top tier species
e. domino species
c
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What is the main technical difficulty in dealing with fusion reactions?
A. The amount of energy needed to overcome the electrical repulsion of the reactants is extremely high. B. The reactants are highly toxic and extremely radioactive. C. It isn't possible to artificially generate the conditions needed for fusion. D. The mass of the reactants is less than the mass of the products. E. none of the above
How could you get information about the strain path (strain evolution) of a shear zone?
What will be an ideal response?
In the Atlantic Ocean, where does the youngest oceanic crust occur?
A. Along the coastlines of the continents. B. Adjacent to the mid-ocean ridge. C. There is no set rule: young ocean crust has a nearly random distribution
World population growth over the past 500 years has most resembled which letter?
A) The letter M B) The letter U C) The letter S D) The letter J