We know this because of the discovery of fossils and bones. We can find out roughly when they existed because of carbon dating.
Answer:
4. mutualism - both benefit
5. Commensalism- one benefits while the other is not affected
"Mutualism is a symbiotic relationship in which both species benefit. Commensalism is a symbiotic relationship in which one species benefited while the other species is not affected."
Answer:
because of the location of the 6 the answer is 6 cent
Answer:
The lanthanides and the actinides at the bottom of the table are sometimes known as the inner transition metals because they have atomic numbers that fall between the first and second elements in the last two rows of the transition metals
Answer:
During ice ages, the most characteristic change to the planet has been the formation and spread large ice sheets and glaciers across much the Northern Hemisphere.
