They believed this because the continents appear to have once been fitted together and it was called pangaea
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Answer:
Examples of fission and fusion
For example, the so-called hydrogen bomb (or H bomb) is actually a deuterium–tritium bomb (a D–T bomb), which uses a nuclear fission reaction to create the very high temperatures needed to initiate fusion of solid lithium deuteride (6LiD), which releases neutrons that then react with 6Li, producing tritium.
Explanation:
Answer:
d.The wing-assisted incline running theory postulates that wings were initially used to maintain balance while climbing up slopes.
Explanation:
Two theories were given to explain the origin of avian flight. The top-down theory suggested that the birds' ancestors were tree dwelling species. They took help of wings to glide from tree to tree in order to avoid predator or catch prey. The bottom up theory suggested that the birds' ancestors were ground dwelling species. They took help of wings to maintain a balance and provide a lift for efficient running.
Wing-assisted incline running was a mixture of both the above theories and gave a balanced view point. According to it, birds' ancestors used wings to maintain a balance while running up inclined slopes. The wings helped them to save energy while scaling slopes and eventually a flight mechanism was also developed.
Answer:
Although the process of DNA testing provides promising results in the forensic department, it still has certain limitations. Some of the problems with DNA testing are:
<em>1) It takes a lot of time to process a single piece of DNA. Along with time, this process is also very expensive.</em>
<em>2) Some critics consider DNA as a violation of ethics. This is because not all of the suspects are culprits. And the blood of all of the suspects is taken to determine a single culprit. Some people consider it unethical for taking the blood of the suspects as humanism is against it.</em>
<em>3) Some countries are working on making DNA databanks, where they will be able to simply compare the sample taken from a crime scene with the DNA databank. In this way, they will easily be able to identify the culprit. This process is again considered to be unethical besides the large amount of money that will be used to create such a large databank. </em>
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