Answer:
the mechanism that darwin proposed for evolution is natural selection . because resources are limited in natural organisms with heritable traits that favour survival and reproduction will tend to more offspring than their peers ,causing the traits to increase in frequency over generation .
Explanation:
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Cgt. DNA has the base pairs A,T,C,G, but RNA has A, U, C, G.
Answer:
from the sun
Explanation: Energy enters the ecosystem from the Sunand exits after the organisms have taken as much as they need. Organisms release energy back into the biosphereas heat. Energy also enters the ecosystem from the interior of the Earth. It is usually in the form of heat, not the electromagnetic radiation from the Sun.
Therapsids are a group of mammal like reptiles that share many features of the body. So basically what this means is that these animals from the Therapsids helps the humans evolve. Therapsids had canine teeth and so do mammals. Their jaws where structured similar to ours and so were their teeth. Their molars were in the back so they chomp their food like meat, just like the humans. The reptiles in the Therapsids group have legs that were more vertical from their body like humans. Where other reptiles did not, they had legs that were sprawled out from their body.The reptiles in the Therapsids group also had turbinates bones like humans. They were also thought to be warm blooded just like humans. There are some similarities that could leave one to believe that there is a connection, but I don’t think so. I think that humans have a more thing in <span>common with chimpanzees</span>
Answer:True
Explanation:Viruses are a very huge problem these days as they are a 100 times bigger than an actual blood cell or bacteria a virus is just a bunch of bacteria in one big bunch