The student weighed pieces of courgette and placed them in five different concentrations of sugar solution.
After one hour she dried and reweighed the pieces of courgette.
She calculated the percentage change in mass.

the concentration of sugar solution that would result in no change in mass is 0.4 moles per dm3
Explain why there was an increase in the mass of the courgette in the sugar solution at 0.2 moles per dm3.

As a small change in a person's dna can cause a genetic disorder

Which of the following types of stars is most likely to end up as a supernova? in graph a, the curve peaks at 800 nm, in the red section of the visible light spectrum. in graph b, the curve peaks at 550 nm, in the green section of the visible light spectrum. in graph c, the curve peaks at 450 nm, in the blue section of the visible light spectrum. in graph d, the curve peaks at 300 nm, in the violet section of the visible light spectrum. a b c d

What is the main fuel source for the work of the cell