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qaws [65]
2 years ago
7

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

Biology
1 answer:
Sedaia [141]2 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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What is the probability that three F2 seeds chosen at random will include at least one yellow seed
sleet_krkn [62]
63/64 
<span>all you have to do is add up all the possibilities of drawing at least 1 yellow seed </span>
<span>YYY=.75x.75x.75=27/64 </span>
<span>YYG=.75x.75x.25=9/64 </span>
<span>YGY=.75x.75x.25=9/64 </span>
<span>GYY=.75x.75x.25=9/64 </span>

<span>totaling up to 63/64!!!!!</span>
5 0
2 years ago
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Look at the data related to honey bee population losses between 2006 and 2013 (Figure 1). Expand on the data. How would you revi
olga_2 [115]

In order to improve the graph and make it more detailed in order to get a better perception why the honey bee populations are decreasing, there's few things that can be added.

- Number of bee keepers over the period

The number of the honey bee colonies is directly connected as to how many bee keepers there are. If there's a trend of a decline in the bee keepers, than there will be a trend in the decline of the honey bees.

- Area of trees suitable for the honey bees

The trees are crucial for the honey bees to be able to produce honey, thus it is very important that they have a certain area of trees on which they can feed upon. If there's a decline in the number of trees for the bees, than the bees will be dying from starvation.

- Pollution

The honey bees are animals that are very sensitive to changes in the environment, especially when it comes to pollution. If the levels of pollution are increasing in areas where there's honey bees, it will certainly affect their numbers in a negative manner.


4 0
2 years ago
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In the pedigree that is shown, which represents Irene's allele combination?
Greeley [361]

The red-green color blindness is a recessive X-linked trait. The females are not affected unless both the X chromosomes have the affected allele. Mostly, the females are the carriers, and the males are affected as they have only one X chromosome. In the given pedigree, the father of Irene have the normal allele, while her mother is a carrier. However, Irene is neither a carrier nor affected. This means that she carries normal alleles on both X chromosomes. Hence, her allele combination is X^{H} X^{H} .

4 0
2 years ago
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What purpose is served by the loss of an -H and -OH end from two molecules as they join together during dehydration synthesis
makkiz [27]

The loss of the hydrogen on one molecule produces a negative charge, which is attracted to the positive charge formed by the loss of the hydroxy group from the other molecule.

4 0
2 years ago
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Which best describes the role of auxin?
finlep [7]

Answer:

Auxin is a hormone of a plant. It is produced in the stem.

Explanation:

This is what causes phototropism. This also helps the plant maintain apical dominance.

8 0
2 years ago
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