Animals with backbones are called vertebrates and animals without backbones are called <span>invertebrates.
I hope this helps you and have a great day!! :)</span>
When the concentration o molecules inside a cell is different form the concentration of molecules outside a cell, we can either call it hypertonic or a hypotonic solution, and the difference between the two concentrations is called a concentration gradient.
Hypertonic - name given to a solution that has a bigger concentration than the concentration in a cell.
Hypotonic - name give nto a solution that has a smaller concentration than the concentration in a cell.
Hope it helped,
BioTeacher101
Have the blood closed at all times with ing vessels of different size and thickness
