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Feliz [49]
3 years ago
8

Which of the following statements about mining is true?

Biology
2 answers:
ella [17]3 years ago
6 0

Answer: d). Mining allows useful minerals to be extracted from the Earth.

Explanation:

Mining is a process of extraction of useful minerals from the surface, subsurface and deep regions of the earth which are of economic importance. The mining involves the formation of a huge crator on the land and underwater regions which takes long time to recover. It exerts a drastic ecological impact that is it destroys the habitat of plants and animals. The soil of the mining site becomes infertile.

On the basis of above information, d. Mining allows useful minerals to be extracted from the Earth is the correct option.

nika2105 [10]3 years ago
3 0
The answer is D. Mining allows useful minerals to be extracted from the Earth.
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Cilia are composed of microtubules. How are microtubules different from the other cytoskeletal filaments?
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Answer:

They are thick, strong and made up of thousands of tubulin which are spiral in shape.

Explanation:

In eukaryotic cells, they have microtubules which are fibres serving as tracks for cell to cell transport and regulate the shape of a cell.

Microtubules are different from other cytoskeletal filaments because they possesses a cylindrical shape with the tube having a larger diameter of 20-25 nm as compared to microfilament that have a diameter of 3-6 nm.

Microtubules are made of subunits of proteins called tubulin named alpha and beta that is not present in other cytoskeletal filaments.

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3 years ago
Explain mendel's experiment with peas on inheritence of characters considering only one visible contrasting character.
m_a_m_a [10]

➜ <u>Mendel conducted breeding experiments with garden peas</u>:

[i] He studied plants (pure) of a tall/short varities.

[ii] He crossed them and obtained F1 progeny.

[iii] He found that F1 progeny was all tall plants.

[iv] He selfed the (hybrid) plants if F1 progeny.

[v] He found that in F2 progeny there were tall as well as short plants.

[vi] The three quarter plants were tall and one quarter was short.

(or any other contrasting character may be taken).

<u>Note</u>: Here, F1 means <u>First fillial generation</u> and F2 means <u>Second fillial generation</u>.

7 0
2 years ago
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3 years ago
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Nonamiya [84]

Answer:

So 1 ml=1 cm^3, so 40ml is 40 cm^3

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Density of oil is 0.75 g/cm^3 (which is verified as oil is less dense than water hence floats on it)

Explanation:

8 0
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