Why Does Earth Have Dry Land

question 1

Multiple Choice

Why does Earth have dry land?

• A) There is not enough water to cover the surface completely.
• B) All planets of the solar system have dry land.
• C) Earth has continental crust, which rides isostatically higher than oceanic crust because it is relatively thick and less dense.
• D) The mid-ocean ridges push up the bottom of the seafloor above sea level. Eventually there will not be any ocean left.
• E) All of these are correct.

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Definitions:

Polygenic Trait

A trait influenced by multiple genes, resulting in a wide range of potential outcomes or appearances.

Gene Pairs

Sets of two genes located at the same position on homologous chromosomes, influencing the same trait but possibly in different ways.

Skin Colour

The pigmentation of the skin, primarily determined by genetic inheritance and exposure to sunlight, varying widely among individuals and populations.

Conception

The moment of fertilization when a sperm cell fuses with an ovum, forming a zygote; also refers to the formation of an idea or plan.