The rock will only displace the same amount of water that the rock's volume is.
1mL = 1cm^3
400mL = 400cm^3.
Crossing over, or recombination is the exchange of chromosome segments between non sister chromatids in meiosis. Crossing over creates new combinations of genes in the gametes that are not found in either parent, contributing to genetic diversity.
C. a toy train is the item that has characteristics similar to a scientific model.