A live, weakened version of the mealse viruse is what is used. So the answer would be D
Light travels in the straight line because it does not generally interact with the medium and wherever it interacts it does change its path
Answer:
I think it's A " The train must be able to complete the trip in six hours "
Answer:
It has to be able to reproduce, it has to maintain homeostasis and it has to use cellular respiration. Hope this helps :)
Explanation:
All of the above points are valid for fossils' contributions in understanding the process of evolution. They allow us to study the ancestry, we can see the homologous organs or structures, if fossils are well-preserved; different fossils can lead us to follow the cycles of the changes that occurred during macroevolutions, and fossils can be used to study different populations which had different body structures for surviving in different environmental conditions.
