Answer:
Pleistocene Epoch
Explanation:
Modern humans coexisted with woolly mammoths during the Upper Palaeolithic period when the humans entered Europe from Africa between 30,000 and 40,000 years ago. Before this, Neanderthals had coexisted with mammoths during the Middle Palaeolithic, and already used mammoth bones for toolmaking and building materials. Woolly mammoths were very important to ice-age humans, and human survival may have depended on the mammoth in some areas.
The Pennsylvania period, Precambrian period, and the Palezoic Era all existed millions of years before mammoths and humans.
Answer:
We can conclude that colonies were able to grow in the absence of histidine due to reverse mutations that enabled the colony to synthesize histidine for its survival. Regarding 2-aminoanthracene, we can see that it induces mutations in an environment, which can be related to a high potential for carcinogenicity.
Explanation:
Reverse mutations can also be called suppressor mutations and occur when a mutation restores a number of genes that were disabled in an organism, for some reason.
According to the action of 2-aminoanthracene shown in the question above, we can conclude that it is a compound that induces mutations, so it was used in the culture medium with no histidine to stimulate reverse mutations in colonies, so that they would grow in that medium culture and synthesize the histidine itself.
However, we must note that a cancer can be developed through mutations. If 2-aminoanthracene is a mutagenic agent, we can consider it an agent with high carcinogenicity.
Leafs do photosythesis because leafs absorb blue and red light and reflect green just an aditional fact for ya
Answer:
tax spend and borrow money
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