All of the following are possible sources of error in a scientific investigation except for a- not being able to complete all trials of an experiment
b- having a constant in your experiment
c- measuring material such as mass and volume incorrectly
d- recording experimental data incorrectly

What are the headings of a data table

How does secondary succession differ from primary succession?

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.