The medium ground finch lives on the galapagos islands. birds with beaks of all sizes were originally part of this population. the finches are seed eaters. the types of food available for them to eat depends on the weather. during wet years, there is a large variety of food. during dry years, there is less food, and large, tough seeds are more abundant than small seeds.

after a long drought, researchers noticed certain differences in the population of medium ground finches living compared to those who lived before the drought. what was different about the finches after the drought?
a.
they had smaller beaks.
b.
they were a new species.
c.
they were smaller.
d.
they had larger beaks.

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.

Seltzer water is created by placing water under pressure with carbon dioxide gas. which of the following statements best describe seltzer water: a. the solution will be slightly acidic b. the solution will be slightly basic. the solution will be strongly acidic. d. the solution will be strongly basic. e. the solution will be neutral

The compound formed from 2 atoms of hydrogen and one atom of oxygen is