Studies of the similarity of the DNA in wasps and bees suggest that the first bees appeared about 130 million years ago, 50 million years before the first known fossil bee, and probably very shortly after the first flowers evolved in the Cretaceous.
A nonexample is the nucleus and the contents of the nucleus, like a membrane
hope this helps
The answer should be Iodine<span />
Answer:
It is true that studying natural selection in the fields can be challenging. Some of the challenges which Darwin might have faced could have been:
Darwin was only studying one trait for his results. But there might have been many other factors or traits affecting natural selection.
Natural selection does not happen rapidly hence Darwin would have had to wait for many generations to observe the results.
The environment is not such an easy factor to study. It is complex. It might have happened that the environment might have changed before any changes were seen in the population of the birds.
Answer:
The rapid emergence of resistant bacteria is occurring worldwide, endangering the efficacy of ... The antibiotic resistance crisis has been attributed to the overuse and misuse of these ... In response, new beta-lactam antibiotics were discovered, developed, and deployed
Explanation:
