What would be considered a biotic factor for a frogs habitat

Actual age your first developed of age well comparison age refers to absolute age true or false

When analyzing tree rings, what do scientists assume a thin ring indicates?

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