"the diagram below represents the electric field in the region of two small charged spheres, a and b.

what is the sign of the net charge on a and b?
(1)a is positive and b is positive.
(2)a is positive and b is negative.
(3)a is negative and b is negative.
(4)a is negative and b is positive."

What problem would a person most likely have if her kidney did not work correctly?

Which of these is not an example of molecular homology? 1. use of dna and rna as genetic material 2.use of glycolysis as the first step in cellular respiration in both plants and animals 3. the lack of an igf-1 gene in prokaryotes 4. the use of aldolase b to break down fructose in bacteria, plants and animals

Slow down transpiration by the stomata question 9 options: a guard cells; closing b chloroplasts; closing c guard cells; opening d chloroplasts; opening