Enzymes.
Enzymes are responsible to make reactions hard to take place, or even very unlikely to happen, to actually happen. They are proteins that have normally an active binding site where molecules may connect to and preform the reaction. The necessary energy to make a reaction occur is less when aided by enzymes and that's what makes of them catalysts so that reactions may occur even when in lower temperatures.
Answer:
compound
Explanation:
Sheets can be grouped into two basic groups: single sheets and composite sheets. The simple leaves are those in which the limb is not divided. The composite leaves, in turn, have the limbus divided into small portions called leaflets. Each leaflet may also have a small petiole, which in this case is called a petiole.
Composite leaves can be further classified into two types: pinnacles and spankings. Pinnacles are those in which leaflets start from the rake (petiole extension) as a feather. The spanking, in turn, has its leaflets starting at the very end of the petiole.
Answer:
By running them under water. The water will separate the rocks from the dirt.
Human evolution known to be a process in which species adapt to certain conditions of life, and in the battle of life and death, they are forced to become stronger in order to survive in this world. Diseases have always been present during the evolution, acting themselves as a natural selectors - the weaker organisms get sick and die. Not just humans, but all species have to establish a great protecting mechanism in order to survive. That is how our bodies are built, to be able to withstand and survive in the conditions we live in, and that is why our immune system has to be taken care of.
