The earliest humanlike creatures that lived in africa three to four million years ago were

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.

Choose the molecule that is described by each phrase. energy used during long activities:

Which of the following is not considered an appendage of the skin? nails glands follicles none of the above