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.
Learn More:
For mor on pitch of sound check out;
brainly.com/question/61859
brainly.com/question/1509263
#LearnWithBrainly
*Genetic determinism of sexes
*Two types are known.
I. Drosophila met at mammals , insects and some plants.
a) Chromosomes have notation:
Masculine ⇒ xy
Feminine⇒xx
II. Abraxas met at amphibians,reptiles,birds and fish.
a) Chromosomes have notation:
Masculine⇒xx
Feminine⇒xy
Answer:
Directional selection vs Disruptive Selection
Explanation:
Directional selection leans to a phenotype that is more fittest to the environment of a species, directional selection favors a phenotype extreme values for a trait over medium ones
<h2>
Name and Function of The Microscope </h2>
A. Objective Lens.
function: gathers light from the specimen, magnifies the image of the specimen, and projects the magnified image into the body tube.
B. Stage Clips
function: hold the slides in place
C. Stage
function: This is the section on which the specimen is placed for viewing.
D. Light
focused light and lenses to magnify a specimen.
E. Base
The bottom of the microscope,used for support Illuminator.
F. Ocular Lens( Eyepiece )
The lens the viewer looks through to see the specimen.
G. Arm
connects to the base and supports the microscope head.
H. Diaphragm
used to vary the intensity and size of the cone of light that is projected upward into the slide.
I. Coarse Adjustment
used to bring the specimen into approximate or near focus.
J. Fine Adjustment
used to bring the specimen into sharp focus under low power and is used for all focusing when using high power lenses.
