Because when he hikes up a hill he does much more effort than when he walks in flat ground, also the heart beats faster in order to send blood to all his organism
The umbrella-like structure in a mushroom is called the
fruiting body. The fruiting body or the pileus is the cap of the mushroom that
produces spore in order to reproduce. They vary in different sizes and are
classified according to their structures.
The answer is metaphase 1
<span>Living Things are Composed of Cells
Living Things Have Different Levels of Organization
Living Things Use Energy
Living Things Respond To Their Environment
Living Things Grow
Living Things Reproduce
<span>Living Things Adapt To Their Environment</span></span>