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3 years ago

What is the Marcellus Shale, and why is it so important to ancient ocean life?

1 answer:

8 0

The Marcellus Shale also categorized as the Marcellus formation is a marine sedimentary rock unit of middle Devonian age found in eastern North America. It elongates throughout the major of the Appalachian Basin.

The shale comprises huge unexploited reserves of natural gas, which makes it an attractive target for export and energy development. There are comparatively scarce presences of fossilized marine fauna found in the Marcellus, however, these fossils are still essential to paleontology.

For example, the Marcellus comprises the primogenital known varied assemblage of thin-shelled mollusks, still possessing well-preserved shell microcomposition. It is also where goniatite, an extinct shelled swimmer identical to a squid, make their initial presence in the fossil record.

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A plant breeder has determined the following variances for yield of corn in his fields:

Law Incorporation [45]

Answer:

A. VG = 80

B. Broad sense heritability = 0.80

C. Narrow sense heritability = 0.30

D. Average yield = 430 Units

Explanation:

A. Given that

VA = 30

VD = 50

VI = assumed not available

Therefore

Total genetic variance (VG) = VA + VD

= 30 + 50

= 80

VG = 80

B. Given that

VP = 100

VG = 80

Broad sense heritability, H2 = VG/VP

= 80/100

= 0.80

C. Given that

VA = 30

VP = 100

Narrow sense heritability, h2 = VA/VP

=30/100

= 0.30

D. The difference in selection = 500 - 400

= 100

Recall,

Selection response is heritability multiplied by selection differential.

That is

R = h2S

Selection differential = 100

Heritability h2 = 0.30

Selection response = 0.30 × 100

= 30units

Therefore, expected average yield = 400 + 30

= 430 Units

6 0

3 years ago

Freckles are a dominant trait in humans. Both of the girls have the genotype FF for freckles. If either one marries a man with n

sweet [91]

The answer is actually 100%

5 0

3 years ago

Please help meeeeee i will mark u

Inessa05 [86]

Im pretty sure its C

7 0

3 years ago

In science class, Maria observes a white-colored cut flower. She sees that the petals turn red when the flower is sitting in a v

Svetlanka [38]

Answer:

Explanation:

Its d I think tell me if it's wrong If it is I'm sorry

4 0

3 years ago

Gene expression products are packaged and modified by the addition and deletion of functional groups in this structure of the ce

pishuonlain [190]

Answer:

Golgi apparatus

Explanation:

Once the protein products are packaged in the endoplasmic reticulum into vesicles that fuse to the Golgi apparatus, these protein products are modified by enzymes. These changes are called post-translational modifications and include the addition of carbohydrates, lipids or some other functional groups. All these modifications are key for protein functionality. After this process is concluded, functional proteins are packaged into vesicles and released to their final destination inside or outside the cell.

3 0

3 years ago