Answer:
1. C communicating with each other
2. C cricket
3. D Water
Answer:
<u>4 types </u>of phenotypes with <u>phenotypic ratio 9:3:3:1 </u>will be obtained.
Explanation:
The Punnett square diagram for the cross between mice with genotype BbCc & BbCc is attached.
It is clear from the diagram attached that the <u>phenotypic ratio</u> will be 9:3:3:1
- The following<u> 9 genotypes</u> will show dominant trait for both the characters i.e. characters represented by B & C genes.
BBCC, BBCc, BbCC, BbCc, BBCc, BbCc, BbCC, BbCc, BbCc
- The following <u>3 genotypes</u> will show dominant trait for one character represented by gene B and recessive trait for other character represented by gene C.
BBcc, Bbcc, Bbcc
- The following <u>3 genotypes</u> will show recessive trait for one character represented by gene B and dominant trait for other character represented by gene C.
bbCC, bbCc, bbCc
- The following genotype is the <u>only genotype </u>which will show recessive trait for both the characters represented by gene B & C.
bbcc
Answer:
As we move through the visible spectrum, red to violet (from right to left in the image), the wavelength _____ decreases_____ and the frequency ____________. .
Explanation:
On the right side are the infrared waves and on the left the ultraviolet spectrum
The relationship between wavelength and frequency is inversely proportional (longer, shorter and vice versa)
Question: The stethoscope is a device commonly used by doctors to monitor heart function. When listening to a heart beating using a stethoscope, the doctor hears the characteristic "lub-dub" sounds. The lub sound represents the (1)____ of the atrioventricular valves and the dub sound represents the closure of the valves between (2)____.
1. closing or opening
2. the arteries and atria, the ventricles and arteries, or the atria and ventricles
Doctors can also use stethoscopes to monitor respiratory function. A wheezing or whistling sound most likely indicates (3)____
Answer:
The correct answers are:
1. closing
2. the ventricles and arteries,
3. a constricted trachea
Explanation:
Lub being the first sound can be heard during the closing of the tricuspid and mitral or the bicuspid valves present in between the atria and the ventricles.
The tricupsid is present between the atrium and ventricle of the right hand side and mitral at the middle of the atrium and ventricle of left side. They helps in prevention of the reverse flow of the blood from the ventricles to their respective atria.
Dub is the second sound produced during the closing of the pulmonary and aortic valves that are present in middle of the left artery and aorta.
They prevent reverse blood flow from arteries into the ventricle. Diastole is the time gap of two sounds which is known as ventricular filling
Wheezing is the high pitched sound that is being produces when a person starts breathing, especially during exhale. It happens during constriction of the airways or the inflammation. This is also taken as a symptoms of diseases like asthma, COPD, allergies, bronchitis etc.
