Scientists believe that the earth's early atmosphere lacked gas because photosynthetic organisms did not yet exist.

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

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.

The more rapidly sedimentation occurs, the more likely it is that the remains will successfully form a fossil. as sedimentation continues, what happens to the amount of weight settling onto the organism? stays the same increases decreases cuts in half