Edward Jenner inferred that a person who once had small pox cannot have it once again. So something is there in these persons which grows after the initial infection which interferes with the secondary infection resisting it.
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Edward Jenner is called the Father of Vaccination. Jenner noticed that the milkmaids who deal with the cows all the time don't generally suffer from the cowpox or small pox. Then as an Experiment, he took some sample from the pustules of the cow having pox and then cleaned it and injected the sample into a healthy child. Then when everyone of the locality suffered from the same disease, that child remained healthy. So that lead to infer that there are something in the pustule which lead to resist the secondary infection of this disease. So this lead to the invention of vaccines.
Answer:
the advantage is free more space to plant crops and farm animals and build houses
the disadvantage is destroying the animal environment and may cause climate change and killing an endangered species by destroying there houses or by accident
Answer:
aortic arches (earthworms)
Explanation:
Earthworms vessels link together
One adaptation that is unique to marine mammals is they nurse their young.. The correct option among all the options that are given in the question is the fourth option or the last option or option "d". I hope that this is the answer that you were looking for and the answer has come to your desired help.
The name of the enzyme present on the mitochondrial membrane, that allows hydrogen ions to flow through to provide the energy to phosphorylate ADP to form ATP is ATP Synthase.
