____________________ occupy narrow niches
Fill in the blanks with correct word
Specialist species
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One of Edwin Hubble's discoveries is that the known universe is expanding. This means that
A) most all observable galaxies are moving away from each other. B) light rays bend as they near the event horizon of a black hole. C) light rays undergo acceleration as they travel vast distances. D) the mass of the universe is slowly dissipating.
A rock sample containing an isotope with a half-life of 28 million years has an initial mass of 184 grams. How much
daughter isotope is present after three half-lives? a. 23 grams b. 46 grams c. 69 grams d. 115 grams e. 161 grams
The terms geologic hot spots and biodiversity hot spots refer to similar areas with similar characteristics, therefore they are often used interchangeably
Indicate whether the statement is true or false
The defining characteristic of a desert is
A. low rainfall B. high temperatures C. shifting sand dunes D. all of the preceding E. none of the preceding