Answer:
A
Explanation:
learned this in earth and space science
The answer is Sand because its soft and u can do lots of things with it.<span />
The most compromised part of the body in the seated dental professional is the lumbar curve. The dental professional most of the time works seated or rotated at the hips. The human adult spine has normally three curves: the cervical (neck), the thoracic (middle back) and the lumbar (lower back). The lumbar curve plays a very important part in keeping the body's balance in an upright position. When working seated, the whole body tilts forward or twists, two situations that apply great pressure on the lower back.
Answer:
There would be no life (except for viruses [if they are considered to be alive]).
Explanation:
These cells are the "building blocks" of life, and all have RNA or DNA in them and a membrane around the outside. The only example of something "alive" without cells might be viruses (like what causes chickenpox or the flu) which are just packets of protein and DNA.