Which of the following assumptions are inherent in the concept of habitable zones?
A. All life-forms require liquid water.
B. The size and energy output of stars with habitable zones will remain constant.
C. Life is present everywhere in the universe.
D. Water is present, in some form, on all planets.
E. A planet's gravity must be similar to that of the Earth's.
Answer: A
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What is the vertical relief (the difference between the highest and lowest elevations) between the volcano observatory at Uwekahuna Bluff on the rim of the crater and the floor of the crater at the 3524-foot bench mark? Note the tick marks on the contour lines.
What will be an ideal response?
The Delaney clause of the FFDCA became increasingly problematic because
A) of the introduction of new pesticides. B) organic farming required the elimination of all traces of pesticides from certified organic products. C) more sensitive analytical chemical techniques could detect previously unknown traces of pesticides. D) humans appear to be more and more sensitive to carcinogenic compounds.
Because sand-sized grains are heavier than silt or clay-sized grains, sand moves close to the ground in a series of short hops called saltation.
Answer the following statement true (T) or false (F)
An ecosystem consists of:
A. The species with which a biological community interacts B. A biological community and its physical environment C. The primary producers within a biological community D. All the species in a biological community E. A physical environment within which a biological community lives