answer:
The ionic bond is a bond between a metal and a non metal while a covalent bond is one between two non metals
D) would be the answer
Why? when using a scientific method you don't want to choose another thing do you?
Stimulation of the sympathetic nervous system is required
<span>Our biosphere is the global sum of all ecosystems. It can also be called the zone of life on Earth, a closed (apart from solar and cosmic radiation) and self-regulating system. Geology studies the Earth, and has tendrils in all ecosystems, thus the connection to the biosphere.</span>
In plants, the chloroplast is necessary to photosynthesis, and mitochondria contain enzymes responsible for producing energy