Answer:
C. hunting and gathering existence.
Explanation:
Paleolithic period, also called Old Stone Age, of human development is characterized by the use of rudimentary chipped stone tools although at that time, humans also used wood and bone tools.
During the Paleolithic Age, hominins grouped together in small societies such as bands existed by gathering plants, fishing, and hunting or scavenging wild animals. Other organic commodities were adapted for use as tools, including leather and vegetable fibers; however were discontinued due to rapid decomposition.
Llamamos pigmentos respiratorios a un grupo de proteínas que tienen la propiedad de combinarse de forma reversible con oxígeno molecular. Por esa razón, pueden transportar oxígeno, captándolo en un lugar y liberándolo en otro.
Answer:
2 & 4
Explanation:
The theory of spontaneous generation stipulated that life emanated spontaneously from ‘nothing’. This was believed to be true until Francesco Redi & Luis Pasteur later falsified this theory using an experiment. He had two plates of cooked meat. He covered one with a glass bowl and left the other open. The plate with a bowl did not develop maggots while the open one did. This showed that maggot was as a result of hatched eggs that were deposited by flies. Life, therefore, emanates from life.
Cancer cells are normal body cells that do not stop growing, when they over produce it causes an imbalance in the body.