D.
If the vibrations have a low frequency, the sound is heard as a __low-pitched sound_____. If the vibrations have a high frequency, then the sound is heard as a __high-pitched sound_____.
Explanation:
High pitched sound is of higher frequency because they make the air molecules vibrate much faster than low-pitched sound. Due to their high frequency, their wavelength is shorter (Remember wavelength and frequency are inversely proportional). Vice versa is true to the low-pitched sound. They vibrate air molecules slower than high-pitched sound. Their wavelength is longer and frequency smaller.
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Neuron- sends message from brain to move up.
Erythrocyte- keeps tissues involved alive, provides oxygen for energy for motion.
Leukocyte- keeps the tissues involved free of disease.
Muscle Fiber- causes the actual contraction of muscles to raise leg
<span> The </span>xylem<span> transports water and soluble mineral nutrients from the roots throughout the </span>plant<span>. It is also used to replace water lost during transpiration and photosynthesis.</span>
The B.genetic diversity because, variation is diversity so it would be between b and d but genotype has to deal with the genetic code leaving B.
