D is false, enzymes can be reused
<span>The answer is A. Food has been, since the emergence of life
on earth, the first source of energy for organisms. This energy was harnessed through
respiration to enable growth and development, movement and also provide heat. Ancient
humans then discovered fire and also harnessed its energy to cook food (making food
easily digestible) and also warming themselves during winter. </span>
<span>The pressure generated during contraction of the atria is less than that generated during contraction of the ventricles.The reason is the different distance from the artria to ventricles and the distance from ventricles to circulatory system.
</span>The distance from atria<span> to </span>ventricles<span> is </span>less than<span> that from </span>ventricles<span> to circulatory system.</span>
Answer:
The answer is NO.
Explanation:
The striations that are caused in the skeletal muscle fibers exist due to the overlapping of the thick filaments with the thin filaments. Hence, if thins filaments would not be present in the myofibrils of a skeletal muscle fiber, then striations would not be caused.
The same goes for thick filaments. If there would be no thick filaments in the myofibrils of the skeletal muscle fiber, then no striations will be caused.
