Which statement is correct? Question 1 options:

The cells that make up lungs and the cells that make up kidneys have different genes, causing lungs and kidneys to look different.

All cells of an organism have the same genes, but different genes are activated within different cells.

When cells and tissues differentiate, they delete the genes they do not need.

All cells have the same genes, and all of a cell's genes are active at the same time.

Molecular models of two different substances are shown below. in the molecule on the left, the oxygen atom pulls on electrons more strongly than the hydrogen atoms. in the molecule on the right, the two oxygen atoms pull on the shared electrons with the same strength. water molecule, h,o oxygen molecule, oz when the two substances are put in the same container, they do not attract each other. why does this happen? a. they both contain oxygen. b. one is polar and one is nonpolar. c . they are both polar. d. they contain different elements.

When the oxygen produced by photosynthetic plants in the water dissolves in the water, which of these is being formed?

24. how are vaccines used to keep people healthy?