Iam doing a test to see if there is a connection between how long you run and how fast your heart beats. i will be performing an experiment where a person will run for a 1 minute and i will check their heart beat. then they will run for 2 min and i will check their heart rate. i will do this up to 6 min and see if there is a connection. what do you think my hypothesis should be? what are my variables?
independent
dependent

Match the types of competition to their descriptions

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

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.