Is a sperms or eggs cells
A) 5
Half-life is the time it will take for a quantity to reduce to half its initial value. In this case, uranium will undergo radioactive decay, and after 700 mil years, 5 of the 10 uranium atoms will have decayed.
A habitat is useful to animal because it is a place where they can easily adapt or wouldn't have to adapt. They could have as many right to food as they need, and they could easily find shelter.
It means that they are not like pre-set blueprints. They react differently according to changes in the environment.<span />
