Osteoporosis <span>is one of the most serious long-term side effects of severe calorie restriction.</span>
A. The population continues to grow
<span>1. A hydrogen fuel cell is more efficient than a combustion reaction because very little of the released energy is released as HEAT.
We need more energy emit as light and less heat. Lesser the heat more the efficiency.
2. </span>when used at home a fuel-cell illuminates the need for <span>an electrical grid</span> because the cell is portable.
As said, it is portable.
Answer C, biochemical comparisons between different organisms. Because it’s comparing the shark and the fly’s genes and proteins.
Answer:
Cnidarians
Explanation:
The cnidarians are the phylum in which every member has tentacles with stinging cells at their tips. The name of the phylum itself actually means ''stinging creature''. This stinging cells are used for capturing prey, holding onto it, inject toxins in it, and subdue it. The stinging cells of the members of the cnidarian phylum are called cnidocytes and they have a unique structure which is called nematocyst. The members of this phylum are actually the well known jelly fishes, corals, as well as the Portuguese man-of-war, and the sea anemones.
