How do scientists know that some mountains were once at the bottom of an ocean ?

Which of the following statements is true? a. there are more chromosomes in an organism than there are genes. b. there are more genes in an organism that there are chemical bases. c. dna is made of sugar, phosphate, and carbon. d. genes are found in specific locations on a chromosome.

Nucleic acid certain protein cell membranes certain carbohydrates

Modern whales developed their traits through natural selection what occurs during the process of natural selection