The answer would be -- A. Cenozoic
67 million years ago in the form of phyollths (small sllica flecks in grass that make it difficult to digest)
Answer:
Metabolism involves exchanges of chemical matter with the external environment and extensive transformations of organic matter within the cells of a living organism. Metabolism generally involves the release or use of chemical energy. Nonliving things do not display metabolism.
Explanation:
Brainleast please
Answer: Single cell organisms dont need a respiratory system because oxygen and carbon-dioxe diffuses between their body tissues and the enviorment.
Yes the first one is very correct they deserve the brainliest answer
