How does random fertilization add to the genetic variation?

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Areal dna molecule consists of thousands of these pairs of nucleotides. what is the pairing arrangement of the nitrogen bases

Which of the following words best matches this definition: the process in which the best adapted organisms survive and pass on their traits, while those that are not well adapted do not survive to pass on their traits. question 3 options: acquired selection natural selection artificial selection organic selection