Oparin-Haldane hypothesis. The Oparin-Haldane hypothesis is named after the two scientists; <span>Russian scientist Aleksandr Oparin and English scientist J. B. S. Haldane. The two scientists separately hypothesized that life began when some inorganic molecules were converted into organic molecules specifically amino acids by the help of energy came from a lightning struck.</span>
Answer:
Oil
Explanation:
Since, unlike oil, source like wind, solar, water etc. come naturally we don't and can't replace them but when the viscosity in oil has been used up it must be change to allow the proper functioning of the machine.
Answer:
a spider has 4 pairs of legs, since they have 8 legs
Answer:
Endoplasmic Reticulum: help form and store proteins.
Golgi Body: sorting and processing proteins.
Mitochondria: converts food (or protein) into energy.
Ribosome: synthesize proteins for use throughout the cell.
Hope this helps
-Amelia
