A good index fossil is one with four characteristics: it is distinctive, widespread, abundant, and limited in geologic time. Because most fossil-bearing rocks formed in the ocean, the major index fossils are marine organisms
Hallo~~~
When comparing optical and radio telescopes, we know that both of these telescopes detect a certain band of the electromagnetic spectrum.
When contrasting optical and radio telescopes, we know that optical telescopes have higher equipment (polished mirrors, accuracy), and that they depend on weather. Radio telescopes have lower equipment (less precise reflectors), and depend on diff. things such as thermal radiation and man-made emissions.
Answer:
C. Disruptive Selection
Explanation:
Disruptive selection occurs when two extremes of continuous variation are favored more than intermediate traits.
The extremes of continuous variation exhibited in this species of snail is the color of their shell which allows them to blend with the background of their habitat.
The shady forest of the habitat makes the dark-shelled individuals to be better hidden from bird predators, while the light-shelled individuals are better hidden in well-lit brushy edge areas. This disruptive coloration exhibited by both individuals makes both individuals of this species of snail less vulnerable to predation.
Both individuals of this species both extremities would naturally survive in this habitat as snails with intermediate extremities would be highly preyed on since there is no area of intermediate brightness in the habitat to make them invisible to predators
Answer:
N/m2
Explanation:
Shear stress on cells lining the walls of the blood vessels is equal to 
20 dyne/cm2
In terms of Newton/square meter, shear stress is equal to
N/m2
Shear modulus is equal to shear stress divided by shear strain
Thus, shear modulus is equal to
N/m2
Volcanic eruptions, floods, landslides
