What type of rock forms due to heating and cooling? A. Slate B. Metamorphic C. Igneous D. Sedimentary​

Researchers want to use edna to look for an invasive species in the water which of the steps would be likely do last

Which one is an advantage of external fertilization a. the offspring are genetically identical to the parents b. more eggs can be fertilzed at one time c. more sperm can be released at one time d. more protection is available for developing plz

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