The answer is R horizon.
The soil is made up of layers, called horizons, which are parallel to soil crust. These horizons are from top to bottom:
O - contains organic matter.
A - contains organic matter mixed mineral matter.
B - contains accumulated mineral or organic compounds.
<u>C</u> - consists of parental material.
<u>R</u> - consists of bedrock, masses of hard rock.
Thus, R horizon is below the C horizon.
Scientists use seismic waves from earthquakes to study the interior and the Earth's magnetic field. The seismic waves indicate the mantle is molten rock that flows like plastic, the outer core is completly molten rock, and the inner core is a solid ball of iron. The magnetic field indicates the inner core is spinning faster than the rest of the planet
Answer:
The attractive force between water molecules is a dipole interaction. The hydrogen atoms are bound to the highly electronegative oxygen atom (which also possesses two lone pair sets of electrons, making for a very polar bond. Hydrogen bonds are very strong compared to other dipole interactions.
Explanation:
Yes they are different,
A food web can show many different consumers and producers in an ecosystem while in the other hand a food web just show the relationship between one group of producers and consumers.
Answer:
Genetic variation is always maintained.
Explanation:
One would think that the part of the population that is not favored in dry years would die and thus reduce the genetic variation but this is not likely to occur, otherwise all the population would die because some individuals would die in wet years and some in dry years. In reality they are able to survive in the transition from dry to humid years or viceversa. Actually, this variability that results from their genetic variability in their adaptability to changes in the climate is what keeps the population alive and able to thrive as time passes.
