The overall population of a species decreased. what could have occurred to make this happen?

What is the cause hearing loss in human being

The structure of a dna molecule is best described as a. one long strand of nucleic acids b. two strands of dna nucleotides joined by hydrogen bonds c. two strands of amino acids joined by hydrogen bonds d. one long strand of amino acids

True or false: the breakup of pangea resulted in warm wet global climates?