Cell division allows for growth and replacement of dead cells. Most multicellular organisms are made of different cell types that are specialised to carry out specific functions. Control and ...

Many species of multicellular organisms differ greatly from each other with respect to the types of developmental mechanisms and traits they have evolved. For instance, by definition every ...

Skeletal muscles work in pairs to move the body. When you move your arm, the bicep contracts while the triceps muscle relaxes. The bicep pulls the bones together, bending the arm. The reverse ...

"We have found a primitive spherical organism made up ... suggests that the evolution of multicellular animals occurred at least one billion years ago and that early events prior to the evolution ...

The fossil offers new insight into the transition of single celled organisms to complex, multicellular animals. Modern single-celled holozoa include ... The fossil’s discovery in an inland lake shifts ...