When a scientific experiment is carried out in a controlled setting, all variables are kept the same except for the variable.
a. environmental
b. observational
c. experimental
d. control

Based on anatomical similarities, to which modern animal is dr. digger’s creature most closely related?

What is the main function of the central vacuole in a plant cell? a. absorbs energy from the sun to produce food b. holds water and maintains turgor pressure c. breaks down molecules to release energy d. contains the cell's genetic material

Which is the correct formula for photosynthesis