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qaws [65]
3 years ago
7

How have scientists determined the earth's core is composed of iron and nickel?

Biology
1 answer:
Sedaia [141]3 years ago
8 0
<span>The correct option from the given options is: "Scientist have determined the composition of Earth's core by using radiometric dating to examine meteorites".
</span><span>To date materials the procedure of radiometric dating or radioactive dating is used, for example, rocks or carbon, in which trace radioactive impurities were specifically fused when they were framed. The strategy looks at the abundance of a normally happening radioactive isotope inside the material to the abundance of its decay items, which shape at a known consistent rate of decay.</span>
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How many ATP are made in the kreb cycle part of cellar respiration?
Elis [28]

Answer:

2 ATP are created in Kreb cycle

6 0
3 years ago
Based on the endosymbiosis theory, what cell would result from the endosymbiosis of a cell with a Cyanobacterium?
kap26 [50]

The image of a point is B'(-4, 11). A 180° clockwise rotation was performed to get this image. What were the coordinates of the pre-image?

(4, -11)(11, 4)(-11, -4)<span>(4, 11)</span>
5 0
3 years ago
Read 2 more answers
How does blood return from the cardiac tissues to the right atrium
Bess [88]
Well the <span>blood returns from the cardiac tissues to the right atrium because
the blood goes through the tricuspid</span> valve and into the right ventricle then the right ventricle makes the blood go to the lungs and thats where the oxygen is at then the blood goes through organs and tissues then gets to the heart through the veins and a vein named the vena cave has the blood return to the right atrium.  
3 0
4 years ago
multigene families include two or more nearly identical genes or genes sharing nearly identical sequences. a classical example i
vova2212 [387]

Identical and obviously duplicated gene sequences have gotten from one chromosome to another by chromosomal translocation.

In terms of genetics, a translocation takes place when chromosome fragments and the (often two) fragmented portions reassociate with other chromosomes. For the diagnosis of several genetic diseases and syndromes, the finding of chromosomal translocations can be crucial.

Multigene families are groups of related or identical genes that have developed by gene duplication. It is thought that a single ancestral gene was duplicated and varied to create multigene families. The multigene families that code for actins, hemoglobins, immunoglobulins, tubulins, interferons, histones, etc. are a few examples.

To  learn more about chromosomes, visit the link below:

brainly.com/question/11880347

#SPJ4

7 0
1 year ago
The fovea has higher _____ than any other part of the retina. this is because each photoreceptor has a smaller ___.
alexandr402 [8]

<span>Concentration of cones (photoreceptors)…..optical nerves. The fovea is responsible for the higher visual acuity 20/20 vision. It is the region if the retina that is depressed and has little blood vessel supply to avoid dispersion of light. While it only comprises 1% of the retina, it makes up 50% of brain’s visual cortex. </span>

4 0
4 years ago
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