ᴴᵒᵗᵗⁱᵉ ʰᵃⁿᵍᵒᵘᵗ ᵖⁱᶜˢ ʷⁱᵗʰ ⁿᵘᵈᵉ ᵇᵃᵇᵉˢ
ｙｏｕ ｋｎｏｗ ｗａｈｔ ｔｏ ｄｏ
ᵇʳᵃⁱⁿˡʸ.ᵗᵒᵈᵃʸ

In the family tree below, people with the recessive trait of attached earlobes are shaded gray.

Organisms are classified, or grouped into categories, based on similarities in their characteristics and/or evolutionary relationships. the study of how organisms are classified is known as

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?