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marysya [2.9K]
2 years ago
11

Which of the parent birds shown above (a or b) appears to have greater fitness? Explain your answer.

Biology
2 answers:
SpyIntel [72]2 years ago
8 0
I say neither because they seem to be the same bird but ill go with B anyway
Elenna [48]2 years ago
4 0
It would be B because the bird would have had to had good health to produce so much offspring
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Some students used vinegar to dissolve away the shells of three eggs and used these eggs as models of human red blood cells. The
777dan777 [17]

Answer:

Just some water is in beaker B.

Explanation:

The water causes the membrane in the shell to grow along with the egg itself, I tried this with 3 eggs as well I put one with just Apple cider vinegar and one with water and another with regular vinegar.

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2 years ago
A species was added into a particular ecosystem to control the population of a prey species. This method of introducing a new sp
Natasha2012 [34]
1- Bioremedation (When you add a species to an ecosystem its not native to.

2- The competition for resources increased in the ecosystem.
 
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2 years ago
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The Meselson-Stahl experiment demonstrated that DNA replication is semiconservative. In the figure, semiconservative replication
vovikov84 [41]

Answer:

b

Explanation:

There were three models for how organisms might replicate their DNA: semi-conservative, conservative, and dispersive.

The semi-conservative model, in which each strand of DNA serves as a template to make a new, complementary strand, seemed most likely based on DNA's structure.

The models were tested by Meselson and Stahl, who labeled the DNA of bacteria across generations using isotopes of nitrogen.

From the patterns of DNA labeling they saw, Meselson and Stahl confirmed that DNA is replicated semi-conservatively.

Mode of DNA replication

Imagine yourself in 1953, after the double helix structure of DNA has just been discovered^1  

1

start superscript, 1, end superscript. What burning questions might be on your mind, and on the minds of other scientists?

One big question concerned DNA replication. The structure of the DNA double helix provided a tantalizing hint about how copying might take place^{1,2}  

1,2

8 0
2 years ago
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Antoine wants to convert millimeters into kilometers. which operation should he choose? he should multiply millimeters by 1,000.
Vadim26 [7]

we know that

1\ km =1,000,000\ mm

so

1\ mm =\frac{1}{ 1,000,000}\ km

therefore

<u>The answer is</u>

to convert millimeters into kilometers

Antoine should divide millimeters by 1,000,000

6 0
2 years ago
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A single gene produces two different proteins, utilizing different exons. What is the most likely explanation?
Helen [10]

Answer:   Differences in mRNA splicing.

Explanation:

The exon is the region of a gene that is not separated during the cutting and splicing process and thus remains in the mature messenger RNA. In genes encoding a protein, it is the exons which contain the information to produce the protein encoded in the gene. In these cases, each exon encodes a specific portion of the complete protein, so that the set of exons forms the coding region of the gene. In eukaryotes, the exons of a gene are separated by long regions of DNA (called introns) which do not code.

RNA splicing is a post-transcriptional process of maturing RNA from which certain sequential fragments are removed. This process is very common in eukaryotes, and can occur in any type of RNA, although it is more common in mRNA. It consists of removing the introns from the primary transcript and then binding the exons. Particularly, <u>alternative RNA splicing takes place when one gene can produce different proteins as a result of what segments are considered as introns and exons</u>. When different segments are considered exons, the result is a great diversity of mature transcripts which produce different proteins.

<u>So, gene splicing is a post-transcriptional modification in which a gene can code for many proteins, which makes it an important source of protein diversity.</u>

6 0
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