Answer:
1 Dragon leg raise. Sets 4 Reps 6 Rest 90sec. Lie on a decline or flat bench, holding the edge of it behind your head with both hands. ...
2 Six-second plank. Sets 3 Rest 30sec. ...
3 Cable crunch. Sets 4 Reps 12 Rest 90sec. ...
4 Pallof press. Sets 4 Reps 12 Rest 90sec.
Explanation:
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I think it is natural selection. genetic variation also could be a factor for physical variation over the years.
Answer:
A
Explanation:
Osteogenic cells the only cells capable of the bone to undergo mitosis (which makes sense as we need bones to function normally). These kind of cells are the ones responsible of growth and repair in the body (like when you break a bone and how takes some weeks to heal is because of that ability).