Answer:
C. DNA is the best/most accurate evidence
Nitrogen is from the atmosphere is converted into nitrates by nitrogen fixing bacteria such as rhizobium which is found in the root nodules of leguminous crops
Sea otters are a keystone species. They play an important role in the health and stability of near shore marine ecosystems. They eat sea urchins and other invertebrates that eat vast quantities of giant kelp. ... Providing habitat is one of many services kelp offers to the marine ecosystem.
Protozoa (unicellular eukarotic organisms) typically reproduces asexually, but sometimes it reproduces sexually, too.
When it reproduces sexually it typically reproduces by conjugation of two mature cells - which means that neither of the cells is "male" or "female"
H2O is classified as a chemical compound.
