Which of the following is not a physical change?

dissolving salt in water

baking a cake

melting wax

freezing water

Which best describes a gene? a. a sister chromatid b. a chromosome c. a tetrad d. a piece of a chromosome

As the pea seeds respire, the level of coloured liquid in the left hand part of the capillary tube rises. by referring to what is happening in the apparatus, explain why the level of liquid changes

What is a dendrite and what does it do?