Which of the following does not describe an element of an ecological niche?
A. the place where the species lives
B. how much water the species needs
C. how much sunlight the species needs
D. how much space the species needs
E. temperatures the species can tolerate
Answer: A
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Why does an atom with many valence electrons tend to gain electrons rather than lose any?
A. Atoms with many valence electrons tend to have relatively strong forces of attraction between the valence electrons and the nucleus. This makes it easy for them to gain additional electrons. B. Atoms with many valence electrons tend to have relatively weak forces of attraction between the valence electrons and the nucleus. Therefore, the outer electrons are free to attract other electrons. C. There is stability in numbers. Atoms with many valence electrons are always attracting new electrons. D. The old adage that "he who has, gets" is also true in atomic structure. Atoms with many valence electrons can essentially overpower atoms with few valence electrons and attract additional electrons.
What kind of drainage pattern has developed inside the Okmok Caldera?
The question is based on Map T-2, the “Umnak, Alaska” topographic map (scale 1:250,000; contour interval 200 feet). What will be an ideal response?
Gradient balance does not involve this force
A) horizontal pressure gradient force. B) frictional force. C) Coriolis force. D) centrifugal force. E) all of the above
When the slowing of a fluid—such as air—is due to the random motion of the gas molecules, the viscosity is referred to as ____________________
Fill in the blank with correct word.