Although all cells in an organism have the same DNA, some cells express different portions of the DNA. The genes that are expressed directly affects-

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

Identify the terms using the following picture. principle of dominance item 1 can be described as the . item 2 can be described as the . the "p" represents from one parent.

The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.