Which one of the following is not made of calcite? a. chert
b. travertine
c. chalk
d. coquina

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

Imagine that a mouse has white fur because of a mutation in its dna. which of the following conclusions can be drawn