A. -50 degrees, it may also be 60 degrees but -50 is much more harsh
The two sources of organic wastes that are produces by aquatic system are Nitrogenous- Ammonia and the decaying remains.
Ecosystem in the body of water is known as aquatic ecosystem. there is also life in the water. Marine ecosystem and freshwater ecosystems are the two types of Aquatic Ecosystems. Lentic, lotic and wetlands are further types of freshwater ecosystem.
Answer:
C. Late Precambrian era
Explanation:
Eon refers to two or more geological eras forms an eon. Eon is mainly divided into four eon namely Hadean, Archean, Proterozoic and Phanerozoic. Phanerozoic includes Palaeozoic, Mesozoic and Cenozoic era. Cambrian falls under the <em>Palaeozoic era </em>which was the major turning point the evolution period of geological time scale. The sudden increase in many diversity of animal phyla was evolved during this period. Also, the first land plant was appeared in this period which gave a promising fact that plants will grow on the apt seasonal conditions.
The answer is a the organisms share common ancestors
