Gregor mendel drew which of the following conclusions from his study of garden peas?
a. during the formation of gametes, the factors separate from each other.
b. inherited traits pass from generation to generation as distinct units, or factors.
c. offspring receive two copies of each factor during sexual fertilization.
d. all of the above are correct.

answer:

convection currents in the magma drive plate tectonics. heat generated from the radioactive decay of elements deep in the interior of the earth creates magma (molten rock) in the aesthenosphere. the aesthenosphere (70 ~ 250 km) is part of the mantle, the middle sphere of the earth that extends to 2900 km.

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when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.