An evolutionary change. According to Darwin, organisms face multiple events where, without a change to match the dangers posed externally (such as environment, enemy threat, etc) that organism will perish without such variation.
Answer:
Blood vessels which help the body carry red blood cells throughout the bodies functions.
Explanation:
Capillaries, the smallest and most numerous of the blood vessels, form the connection between the vessels that carry blood away from the heart (arteries) and the vessels that return blood to the heart (veins). The primary function of capillaries is the exchange of materials between the blood and tissue cells.
Weather can differ and change with climate and can almost change suddenly. Erosion is wear from the surface or areas over time.
Answer: metal—specifically, iron and nickel.
Explanation: Unlike the mineral-rich crust and mantle, the core is made almost entirely of metal—specifically, iron and nickel. The shorthand used for the core's iron-nickel alloys is simply the elements' chemical symbols—NiFe.
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B alleles that are expressed