In reference to the origin of life, photosynthesis is more ancient than aerobic cellular respiration because select one: a. plants evolved before vertebratesb. earth's early atmosphere did not have oxygenc. there is no reason for cellular respiration to occur without glucose from plantsd. carbon dioxide was contributing to global warming, to photosynthesizers recycled it.

Photosynthesis operates in plants and initially produced free oxygen to change the atmosphere to support non-plant organisms, consequently, a, plants arose before vertebrates and other oxygen breathing organisms, but plants did not evolve, they were created.

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.

fossil's are like over rated rocks like low key not gonna lie i don't get why we can't just call them old rocks like for real i mean i call my grandpa and grandma that smh