Which of the fallowing provides support and protection for many insects mussels skeleton spinal cord exoskeleton

Which prevent errors in dna replication? a. helicase enzyme checks the dna for errors. b. each base can attach to only one other type of base. c. ribosome enzymes prevent errors from happening. d. dna contains no complementary base pairs.

How many copies of each chromosomes should be present in each of the 4 final haploid versions of gamete?

What must be true for natural selection to heppen