I believe one of them doesn’t have an nucleus
Coral reefs are home to numerous species because animals can hide within cracks and crevices in the reef created by corals to hide from predators. It’s their safe house.
All living cells need nitrogen to make nuclei acids, proteins, and other cellular constituents. Plants absorb nitrogen and put them into amino acids and proteins.
You can use a couple of the following: Arsenic, carbon monoxide, cyanide or
mercury compounds.
It works like a lock and key. The lock is the enzyme and the key is the substrate. The enzyme works as a catalyst, speeding up the reaction time.