The life span of a star depends on:
plz hurry :)

Nucleic acid certain protein cell membranes certain carbohydrates

Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils

What is the most abundant vertebrate on earth?