What is used for comparison purposes in an experiment to show what would happen if no treatment or change in the independent variable is made. A. Constant
B. Control
C. Scientific theory
D. Scientific law

Q: a pair of homologous chromosomesa) always has the same genes and the same allows b)always has the same genes c)always has the same alleles d)never has the same genes

Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley

Plz will mark! the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?