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4 years ago

You notice a buildup of dark clouds and shifting winds. what is likely?

Biology

2 answers:

GarryVolchara [31]4 years ago

8 0

A build up of dark clouds and shifting weather indicate that dangerous weather is coming. A front is approaching.

Ronch [10]4 years ago

6 0

Answer: If we observe a buildup of very dark color clouds and the gradual shifting of wind direction, then it should be clear that a severe weather condition is approaching, which might result in either thunderstorms or heavy rainfall, most probably with lightning.

This could be due to the existence of a cold front where the warm air is removed by rising up, and results in the drop of temperature.

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The opening and closing of _____________in your heart create the lub-dub sound and prevent the backflow of blood.

iVinArrow [24]

Answer:

Heart valves or the closure of the mitral and tricuspid atrioventricular (AV) valves at the beginning of ventricular systole and the closure of the aortic valve and pulmonary valve at the end of ventricular systole.

Explanation:

The heart tone “lub,” or S1, is caused by the closure of the mitral and tricuspid atrioventricular (AV) valves at the beginning of ventricular systole.

The heart tone “dub,” or S2 ( a combination of A2 and P2), is caused by the closure of the aortic valve and pulmonary valve at the end of ventricular systole.

4 0

3 years ago

Which molecule will undergo only london dispersion forces when interacting with other molecules of the same kind?.

chubhunter [2.5K]

Butane, C₄H₁₀ will undergo only London dispersion forces when interacting with other molecules of the same kind.

London dispersion force:

The weakest intermolecular force is called the London dispersion force.
When the electrons in two nearby atoms occupy positions that cause the atoms to temporarily form dipoles, the resulting transient attractive attraction is known as the London dispersion force.
There are instances when this force is referred to as an induced dipole-induced dipole attraction.

Butane molecules only exhibit London dispersion forces because they are non-polar and have a symmetrical distribution of electron density.

Butane:

It is a covalent non-polar molecule. Every C-C and C-H bond is non-polar. This is because there is little or no electronegativity difference between C and C in C-C bonds and none between C and H in C-H bonds.

Learn more about the London dispersion force here,

brainly.com/question/4301021

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8 0

2 years ago

Migration is _______. a. the movement of organisms from a native location to a foreign location b. the movement of organisms fro

sukhopar [10]

D. the seasonal movement of organisims between locations

7 0

3 years ago

Read 2 more answers

What are important facts about the digestive system

yarga [219]

Answer: The average person produces 2 pints of saliva every day. ...

The muscles in your esophagus act like a giant wave. ...

The second part of your small intestine is called the jejunum. ...

Enzymes in your digestive system are what separate food into the different nutrients that your body needs.

Explanation:

Your welcome!

7 0

3 years ago

Read 2 more answers

The order of the genes on a plant chromosome is A, B, C, where A and B are located 10 cM apart and B and C are located 3 cM apar

Nonamiya [84]

Answer:

Double Crossing-over prob = 0.3%
Simple Crossing-Over prob A-B = 9.7%
Simple Crossing-Over prob B-C = 2.7%
Total Crossing-Over prob = 12.7%

Explanation:

Available data:

order of the genes on a plant chromosome is A, B, C
A and B are located 10 cM apart
B and C are located 3 cM apart

The genetic distance = recombination frequency x 100 expressed in map units (MU). One centiMorgan (cM) equals one map unit (MU).

We can use the provided map with the distances between genes to predict the occurrence of any kind of recombinant gamete.

We know that there is a probability of a simple crossing over to occur between genes A and B, or between genes B and C. And we also know that there is a probability of double crossing-over occurrence.

We can get the probability of the double-crossing over by multiplying the recombination frequencies between A-B and B-C. So,

DCO prob = recombination frequency A-B x recombination frequency B-C

= 0.1 x 0.03 = 0.003 = 0.3%

DCO prob = 0.3%

According to this, we would expect to find

0.15% AbC
0.15% aBc

Now we need to know what are the probabilities of getting a simple crossing-over, SCO. We already have the genetic distances between genes. 10 cM equals 0.1 of recombination frequency, and 3cM equals 0.03 of recombination frequency. However, we can not estimate the probabilities of simple crossing over using only this information, because this data is including the probabilities of the double crossing-over occurrence. So we need to substrate this percentage.

SCO prob A-B = 0.1 - 0.003 = 0.097 = 9.7%

SCO prob A-B = 9.7%

we would expect to find

4.85% Abc
4.85% aBC

SCO prob B-C = 0.03 - 0.003 = 0.027 = 2.7%

SCO prob B-C = 2.7%

we would expect to find

1.35% ABc
1.35% abC

The total Crossing-over probability, TCO, is then the sum of all the crossing over probabilities,

TCO= SCO A-B + SCO B-C + DCO

TCO prob = 9.7% + 2.7% + 0.3%

TCO = 12.7%

8 0

3 years ago