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sveticcg [70]
3 years ago
7

Multiple choice biology question need help ASAP

Biology
2 answers:
Tatiana [17]3 years ago
6 0
The answer is C, hope I helped (:
zubka84 [21]3 years ago
4 0
I think the answer is c plz tell me if i am wrong

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You start a PCR with 1,000 molecules of DNA, an excess of primers and an excess of nucleotides. The PCR works perfectly and each
arsen [322]

Answer:

2.048 x 10^6 No. Of Copies

Explanation:

The DNA replication in a PCR works exponentially by using the 2^n where n represents the number of cycles.

For one molecule of DNA = 2^11 = 2048 No. Of Copies

For 1000 Molecules of DNA = 1000 x 2048 = 2.048 x 10^6 No. Of Copies

8 0
3 years ago
If meiosis failed to occur in both male and female worms the zygote nucleons would resemble diagram
den301095 [7]

Tetraploidy will occur.

<h3><u>Explanation</u>:</h3>

The process of sexual reproduction is very necessary to maintain the genetic setup of the species over the races.

The normal chromosome content of a cell is called diploid state of cell. Its represented by the expression 2n. The cell division that takes place before the gamete formation is called meiosis. This cell division makes the chromosome number of the cells halved. So haploid cells are produced. Its represented by n.

Now as the gametes fuse, both the n becomes 2n and diploid state is regained.

But if the meiosis don't occur in the gametes, the gametes will remain 2n. So after fertilization, it becomes 4n. This state is called tetraploidy.

6 0
3 years ago
PLEASE PLEASE ANSWER FAST PLEASE
Kisachek [45]

Answer:

The most common myths are:

- C0vid2019 vaccines cause autism  

- C0vid2019 vaccines may modify your DNA

- C0vid2019 vaccines are unsafe

Explanation:

The most common myths associated with C0vid2019 vaccines are:  

1- C0vid2019 vaccines may cause autism: In 1998, Andrew Wakefield and colleagues published a controversial study in the Lancet where they suggested that the measles, mumps, and rubella (MMR) vaccine may cause autism in some children. However, it has been showed that this study was based on erroneous statements and therefore this publication was retracted.

2- C0vid2019 vaccine may modify your DNA: it has been suggested that vaccines based on viral vectors (e.g. adenoviruses) and mRNA vaccines may modify the DNA of cells. This statement is false because these technologies cannot alter the DNA sequence. These vaccines are based on the production of an mRNA sequence that is translated into a viral protein (spike protein) which triggers an immune response

- C0vid2019 vaccines are unsafe: some people believe that C0vid2019 vaccines are unsafe because they were developed quickly. However, this statement is false because all vaccines (including C0vid2019 vaccines) need to follow rigorous safety standards to be approved by governmental agencies (i.e., they approved all clinical trials).

4 0
3 years ago
The semilunar valves of the heart open at the onset of the ejection period. Approximately what percentage of the stroke volume i
mr Goodwill [35]

The percentage of the stroke volume is ejected during the first quarter of systole will be approximately 60% to 65%

<u>Explanation:</u>

The time interval between the atria contraction and the relaxation of ventricles are called as a Cardiac cycle. Systole denotes the heart contraction during the blood pumping. Diastole refers to the heart relaxation when the blood is filled in the heart chambers. The total blood is not fully pumped by the ventricles.

Instead they will pump only a proportion of blood in each of the cardiac cycle.  The ejection fraction refers to the proportion of the intraventricular volume that is received as a output in circulation process. A human with normal heart functioning can have approximately 60-65%. This is known to be stroke volume. The blood volume that is ejected is strove volume.

7 0
3 years ago
What will most likely occur if the population of the world continues to increase at predicted rates?
Brut [27]

Answer:

O There will be more rapid depletion of natural resources.

Explanation:

as more and more humans are born they will need more and more food homes and many other things, but they will eventualy run out.

Please give me brainly (if it is correct which i am certain it is)

6 0
2 years ago
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