What movements occur at the hip joint and knees as you bend down to touch your toes?

How does the study of genetic disorders such as pku biologists understand normal alleles?

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

Do the following statements describe actin, myosin, both of the proteins or neither of the proteins? (a) contains a binding site for calcium (b) found in the i band (c) exists in a globular (g) form and a filamentous (f) form (d) contains a binding site for atp (e) is a component of the thin filament (f) is a component of the thick filament