A. first law of motion
Or the law of inertia states that an object in motion stay in motion and an object at rest stays at rest unless acted upon by a net unbalanced force
The name of the structure labeled as A is 'myosin'. Moreover, the name of the structure labeled as B is 'actin'.
A sarcomere is the basic unit of muscle contraction. This unit is defined as the region between two Z-lines.
Band A is a central band composed of the thick filaments of myosin.
Moreover, the sarcomere also has two halves of a band known as I-band, which consists of thin filaments of actin.
Muscle contraction is caused by the interaction between actin and myosin protein filaments in the sarcomeres.
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Red blood cells are able to maintain homeostasis because they are bathed in blood, which is isotonic <span>to the fluid in the cells themselves.
</span>A solution is said to be isotonic when its effective osmole<span> concentration is the same as that of another solution.</span>
Speciation forms new species.Directional selection favors one extreme of a phenotype, which leads to evolution and adaptive change of a species.Disruptive selection selects against the average and leads to evolution and genetic variation of a species.<span>Stabilizing selection favors the average individual in a population, which does not lead to adaptive change or evolution, and reduces variation. </span>