By 1863, control of most of the mississippi river was in union hands. to gain control of the last major port city serving as an open shipping door to the south, grant weakened the enemy with a military campaign that lasted several months. first he isolated the port city by gaining control of the railroad, and then he began a seven-week artillery siege to force surrender.

what is the port city described above?

a. chancellorsville
b. new orleans
c. vicksburg
d. appomattox

Agene editing technology called crispr-cas9 uses cellular machinery to change the cell's genetic material. how might this technology be useful in treating diseases like cancer?

Select the correct answer from each drop-down menu. the lac operon in e.coli regulates genes that code for enzymes required for breakdown of lactose. the lac operon is operon that is activated in the presence of .

Solar energy causes water to evaporate into the atmosphere. how does that water vapor become a cloud? a) as the water vapor goes higher in the sky, the air gets cooler. the cooler air causes the water vapor to condense. b) as the water vapor goes higher in the sky, solar energy causes it to condense around particles of dust. c) as the water vapor goes higher in the sky, the air gets warmer and the water vapor begins to condense. d) as the water vapor goes high into the atmosphere it turns to ice and that's what forms clouds.