An elephant's trunk evolved in order to be able to stuff in and eat as much food as it can to become the big animal it is today.
The elephant's ancestors were small and had a short nose. As it turns out, the larger body size the elephant has, the more chance it gets to survive and pass on its genes to the next generation. In order to gain a larger size, it needed to eat more and be able to reach more food. Of course, its small nose wasn't capable of doing that at the time. So, through natural selection, eventually the elephants that were bigger, had longer trunks, and therefore ate more, were more likely to pass on their genes to the next generation than their smaller counterparts, and therefore with each generation elephants got longer trunks.
I know I'm late, but for any who need this answer again, the answer is
(B) to exchange oxygen with carbon dioxide.
Brainliest Please I need it. Also hit the thanks!
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Answer:
Gene therapy is the process or replacing mutated genes with normal genes in an attempt to heal diseases by correcting the functional code of the gene. Mutated genes can cause genetic disorders. Transformation and transfection are the two methods used to insert a normal gene into an organism. The process of transformation occurs in a laboratory. Cells are grown in the lab and then introduced to DNA that carries the gene of interest. Transfection uses a virus to introduce the gene of interest to the host cells.
Gene therapy is a relatively new biotechnology. It is very expensive and much more research needs to be done before it is perfected. Gene therapy has had the best results in the treatment of cancer. One of the ways gene therapy is used in cancer treatment is by inserting a gene that is more sensitive to treatments such as chemotherapy and radiation.tion:
A hypothesis is basically a prediction of what you think is going to happen during a science experiment.
A good hypothesis should have an "If... Then... Because..." format.
Ex: If we put a bowl of ice cream and an icecube outside, then the icecube will melt first because there is more icecream than icecubes.
Answer:
Gulf of Mexico, Lake Tahoe, Mississippi River, etc. (you can just search it up btw.)
Explanation:
