Answer:
because of something called mossillization
Answer:
All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these characteristics serve to define life.
Answer:
protons, neutrons and electrons
Explanation:
Answer:
make me brainest
Explanation:
the heart , blood, blood vessels form the circulatory system