Scientists tested the effect of a fertilizer on the growth of plants. they had 2 sets of plants, group a which gets fertilizer, water and sun and group b which gets only water and sun (but in equal amounts to group a).
1. explain how this scenario is a controlled experiment and identify the manipulated variable.

2. if the scientists only performed 1 experiment but it supported their hypothesis, why can it not be considered a theory?

3. the graph below was created showing the growth of the plant. how would you know that the y-axis is measuring the growth of the plant?

1.) Its a controlled experiment because both groups A and B get the equal mount of sunlight and water. The manipulated variable would be the fertilizer.

2.) Because a theory must consists of more than experiment before it can actually be considered a theory. It must be performed multiple times.

3.) Because if the growth was on the B spot, the graph would be a bar graph because the growth would still increase by each day.

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

explanation:

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.