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sdas [7]
2 years ago
10

In the heart, an action potential originates in the __________.

Biology
1 answer:
jeka57 [31]2 years ago
3 0

Answer:

sinoatrial (SA) node

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The pictures below show a cave and a geyser.
Talja [164]
I think the correct answer from the choices listed above is option C. The statement that is correct about  the cave and geyser would be that the <span>cave is formed when groundwater reacts with the limestone in rocks and the geyser is formed when groundwater gets heated. Hope this answers the question.</span>
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Which statement best describes how Channel and carrier proteins in the plasma membrane are similar
olganol [36]

Carrier and channel proteins in the plasma membrane are similar because they are both transport membrane proteins that allow molecules to flow in and out of the membrane. Meanwhile, carrier protein can further be classify as active or passive transport. These two transport proteins makes cell’s ability to perform their functions well by maintaining a difference between the intracellular and extracellular environment.

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Why is Earth’s inner core solid and its outer core liquid ?
marshall27 [118]

Answer:

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Explanation:

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2 years ago
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On your Spring Break in Mexico, you take a break to count the starfish in a tidal pool. You notice that there is a rare recessiv
lana [24]

Answer:

0.04 for 6 legs starfish and 0.96 for 5 legs starfish.

Explanation:

The allele frequency for the 6 legs starfish is 0.04 whereas, the allele frequency for the 5 legs starfish is 0.96 because there is only one 6 legs starfish in the given population as compared to 5 legs starfish. The low population of 6 legs starfish is due to the presence of recessive allele while on the other hand, higher population of 5 legs starfish is due to the presence of dominant allele. The allele frequencies for both population is done by dividing the allele of interest by total number of alleles present in the population.

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3 years ago
How does the Richter scale measure an earthquake?
USPshnik [31]

Richter's original magnitude scale (ML) was extended to observations of earthquakes of any distance and of focal depths ranging between 0 and 700 km. Because earthquakes excite both body waves, which travel into and through the Earth, and surface waves, which are constrained to follow the natural waveguide of the Earth's uppermost layers, two magnitude scales evolved - the MB and MS scales.

The standard body-wave magnitude formula is

MB = log10(A/T) + Q(D,h) ,

where A is the amplitude of ground motion (in microns); T is the corresponding period (in seconds); and Q(D,h) is a correction factor that is a function of distance, D (degrees), between epicenter and station and focal depth, h (in kilometers), of the earthquake. The standard surface-wave formula is

MS = log10 (A/T) + 1.66 log10 (D) + 3.30 .

There are many variations of these formulas that take into account effects of specific geographic regions so that the final computed magnitude is reasonably consistent with Richter's original definition of ML. Negative magnitude values are permissible.

6 0
3 years ago
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