Answer: they are mostly single celled organisms and they usually reproduce A-sexually.
Fossil fuel<span> is a general term for buried combustible geologic deposits of organic materials, </span>formed<span> from decayed plants and animals that have been converted to crude oil, </span>coal<span>, natural gas, or heavy oils by exposure to heat and pressure in the earth's crust over hundreds of millions of years.</span>
Answer:
jawless fish were earth 's first arthropods
Answer:the the frog is an amphibian, it lives on both water and land.
Explanation:
