A. Most recent period of the Cenozoic era.
This image is a partial lunar eclipse. The moon is only showing partially, so it's not total, and the brighter side is showing.
We should expect that the rat will have have more difficulty in learning the task compared to a normal rat. This is because the rat has been injected with a certain drug that oppresses the dopamine activity. And then the rat is placed in an operant chamber where a lever-pressing task is shaped through positive reinforcement.
The effect that the capture of Vicksburg had upon the confederacy was that the states west of Mississippi became completely isolated. The Mississippi valley states were no longer considered a great threat. This also opened the doors of invasion for the states that lied to the deep south. Vicksburg was an important place to capture in respect to its geographical position.
binary fission?
In binary fission, the parent is split into two daughter cells, each genetically identical while receiving a copy of DNA
