Answer:
disposing of them in sink drains
Explanation:
a thru c are reasonable, logical things to do, d on the other hand is a big no
The atomic mass = nucleon number
so, 16-7 = 9 neutrons
7 protons, 9 neutrons
Answer:
The answer is C. nitrogen
Explanation:
its fixed by a bacteria know as rhizobium
Their bodies taper to points at both the snout and the tail, reducing water resistance. Also decreasing drag -- and therefore noise -- are dermal denticles, sharp scales that cover the skin of most shark species. Rather than bone, sharks have cartilage, which is much lighter and more flexible. In addition, their livers produce squalene, a fatty oil that helps them remain afloat. Their pectoral fins allow them to quickly change direction, dive and swim upward.
http://animals.mom.me/unique-adaptations-sharks-survive-7845.html