Genes on a pair of chromosomes often cross over during meios…

Genes on a pair of chromosomes often cross over during meiosis, as shown in the diagram.  The discovery of crossing over added to Mendel’s law of independent assortment, which stated that genes assort independently of one another. What did cross-overs indicate?

Select the subcellular structure from the table below to MAT…

Select the subcellular structure from the table below to MATCH with the definition below: A large membrane-surrounded structure predominant in plant cells occupying 50% to 90% of the cell’s space that functions in nutrient storage, waste management, predator deterrence, sexual reproduction and physical support.  (enter your number choice):

A scientist wanted to determine the best level of light inte…

A scientist wanted to determine the best level of light intensity for photo- synthesis in an aquatic plant. He varied the light intensity and measured the amount of a gas produced by the plant at each level of light intensity.  Which is the dependent variable in this experiment?