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Yuliya22 [10]
4 years ago
7

Fossils allow scientists to determine when and for how long a certain species lived. What can scientists deduce from this discov

ery? A. earth's life has changed over time B. which fossils are heavier C. explain how earth remained unchanged D. the food sources that were available
Biology
1 answer:
vagabundo [1.1K]4 years ago
8 0
I believe the answer is A. earth's life has changed over time
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Water is harnessed to move a turbine. How is energy converted in this case?
Helga [31]

Answer:

Kinetic energy, to mechanical energy

Explanation:

In this case, where moving water is being used to turn a turbine, the moving water has kinetic energy. This kinetic energy is then converted to mechanical energy where the turbine is then turned.

After this, the turbine may be used to generate electricity, and in this case, as the mechanical energy of the turbine is building up, it gets converted into electrical energy, which can be stored in batteries, or released to homes.

4 0
3 years ago
Why do i only have one dimple on my left cheek?
Radda [10]

Answer:

A single dimple on one cheek is a rare phenomenon. Transfer of dimples from parents to children occurs due to just one gene. The dimple creating genes are present in the sex cells prior to the process of reproduction. Each parent provides one of these genes to the child.

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3 years ago
Recommended dietary allowances were first published in which decade?
serg [7]
Was it in the 1940's????
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3 years ago
What is true about an offspring produced by selective breeding
Viefleur [7K]

Answer:

The offspring inherits certain desirable traits from its parents.

Explanation:

i took test

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3 years ago
Hemoglobin is a complex protein that contains four polypeptide chains. The normal hemoglobin found in adults, called adult hemog
Evgesh-ka [11]

Answer:

1) A, C and D

2) D

Explanation:

The normal hemoglobin is made up of heme and globin. The protein, globin is in turn made up of four polypeptide chains which include two alpha and two beta chains.

The gene gene responsible for the creation of the beta globin chain is located on the short arm of chromosome eleven. It is called the HBB gene. Many mutations occur on the HBB gene and a mutation on this gene produces abnormal hemoglobin like HBS, hbc, and hbe. HBs causes sickle cell anemia.

In sickle cell anemia, there is an alteration of the genetic code, leading to the substitution of a single amino acid where glutamic acid is replaced by valine in the sixth position of the beta chain.

In the mRNA, the change converts a glutamic acid codon(GAG or GAA) to a valine codon(GUA, GUC, GUU or GUG).

Sickle cell anemia is caused by a transversion that leads to a missense mutation.

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3 years ago
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