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3 years ago

An unknown mineral scratches apatite and is scratched by corundum. What can you conclude about this mineral’s hardness?

Biology

2 answers:

Gala2k [10]3 years ago

8 0

If we guide ourselves with the Moh´s scale:

Material scratches apatite → material is harder than 5.

Material is scratched by corundum → material is softer than 9.

Conclusion:

The hardness of the unknown material stands between 5 and 9.

Note:

Both apatite and corundum are defining materials (reference materials in the Moh´s scale). So, you can also give an answer using defining materials:

"It can either be an orthoclase feldspar, a quartz or a topaz".

Hope it helped,

BiologiaMagister

<u><em>This answer is dedicated to JaySL</em></u>

stiks02 [169]3 years ago

5 0

Answer:

the hardness is more than 2.5

Explanation:

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As this ratio is deviating from 1:1:1:1, it indicated the two genes are linked.

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Percentage crossing = recombination frequency = percentage of recombination.

Recombination frequency $=\frac{\text{total no. of recombination}}{\text{total no. of progeny}}\times 100$

$=\frac{14+10}{100} \times 100$

= 24 %

= 24 map units

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