Explanation:
Continental drift is the theory which states that the continents of the earth moved away from each other over a period of time. It is believed that this theory was opposed by many scientists because they stated that there weren’t enough evidence of mechanism to prove the drift between the continents.
However, it was also rejected because this theory opposed many ongoing geological theories like geosyncline theory, uniformtarism theory even when sufficient evidences were there to prove the continental drift theory.
Farming and the surplus of food allowed humans to focus on activities other than food production, which led to the division of labor and the creation of new social classes-True.
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Farming refers to those activities that are associated with the cultivation of crops and growing livestock. When the crops that are cultivated exceed the nation of a particular nation, then it leads to the surplus of food. In that situation, the governments will take necessary steps for storing the cultivated crops for the future usage.
When different works are allotted or assigned to different workers for the completion of certain tasks and also for improving the efficiency refers to the division of labors. When the Framing and the surplus of food exits it makes them to concentrate on the activities other than farming and this will increase the division of labor and the creation of new social class.
Answer: A. Deletion
Explanation:
It is deleting base pairs from the gene sequence
B. To orient themselves and to find food
Since they cannot see very well or even at all in some cases, these animals use echolocation instead to orient themselves, to find where they are, and to find food.
