The answer is Neolithic or the New Stone Age. The Neolithic period is known for the spread of agriculture, used of stone tools and also the time where the cereal cultivation for agriculture and animal domestication were introduce and lastly the appearance of pottery is also known as a symbol during this time.
Out of the following given choices;
A. theory that fish and mammals have a common ancestry
B. theory that the first organisms on Earth were heterotrophs
C. close relationship between fish and mammalian reproductive patterns
D. close relationship between humans and annelids
The answer is A. Many embryos of the kingdom Animalia share similarities in the early stages depicting that they share a common ancestor. The gill slits is one example. They diverge in later stages to become Pharyngeal in the human embryo, while they differentiate into gills in fish.
Answer:
B it think
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The dependant variable would be the salmon, because they depend on the water and pollution levels to give a result.
Answer: all of them
Explanation: I think they’re all true
Hope this helps!
