The sliding filament model of contraction involves

a) actin and myosin sliding past each other and partially overlapping
b) the shortening of thick filaments so that thin filaments slide past
c) actin and myosin lengthening in order to slide past each other
d) the z discs sliding over the myofilaments

A) action and myosin sliding past each other and partially overlapping

Explanation:

The muscle contraction occurs by the interaction between two protein filaments in sarcomeres (actin and myosin). During this process there is a “shortening” of the sarcomere, caused not by changing the length of the actin and myosin filaments, but by overlapping these filaments,

surface modification is a versatile tool and has been widely used in material science and engineering that has significantly facilitated the study and characterization of complex materials. at  matexcel, experienced experts in surface science can offer tailored efforts to meet the specific needs from our clients.

because the light is a great source of energy for the plants to survive. (i hope this )