What is the most common element in the human body?

i'd say that the moon rock is about 2.2 billion years old.

science-ocean floors and habitats study guide by volleyballqueen3817 a major advance in ocean-floor mapping. list four sections of the ocean floor. algae that use sunlight to produce their own food through photosynthesis. all of the feeding relationships that exist in a habitat. drying out, predators, find food.

a- all cells come from pre-existing cells

b a mature ovary of a plant.