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Grace [21]
2 years ago
6

Why would scientists use a control sample that has no DNA from bighead carp in eDNA surveillance?

Biology
1 answer:
Yanka [14]2 years ago
3 0

Answer:

cientists would use a control sample that has no DNA from bighead carp in Edna surveillance in order to verify that no DNA has contaminated the gel. It would eliminate certain errors in the experiment. What are some of the things that your DNA can be contaminated with?

Explanation:

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Through which tissue do sugars get transported to reach the leaves during growth and reproduction?
nika2105 [10]

The correct  answer is Phloem

Explanation:

Phloem is a transport tissue of vascular plants. It is used for transport of food and nutrients, so sugar is definitively brought by phloem.Other choices cannot be right because collenchyma and parenchyma are ground tissues, while xylem is the carrier tissue similar to phloem but worked for a conveyor of water and minerals. 

5 0
3 years ago
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The chromosomal mutation in the zygote can be traced back to which of the following? (4.3, 4.4)Immersive Reader
lawyer [7]

The chromosomal mutation in the zygote can be traced back to "Chromosome 6 in the egg cell".

<u>Option: B</u>

<u>Explanation:</u>

In germ cells i.e. egg or sperm cells, the mutations in chromosome often happen during the meiosis phase. The number of chromosomes in egg cells or sperm cells must be haploid, so that diploid chromosomes form zygote on fertilization. Chromosome mutation in meiosis leads in an additional set of chromosomes or structural defects in the chromosome.

Chromosomal mutations are often caused by chemical agents or by mutagens. The homologous chromosomes are segregated from sister chromatids throughout cell division, any abnormality at this point allows the chromosomes to be unequally divided or not disjuncted, same is observed in the situation seen in egg cell chromosome 6.

3 0
2 years ago
How can you best help prevent water pollution? 
marysya [2.9K]

Answer:

Definitely A is the correct option

6 0
3 years ago
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Select the elements that are considered to have a high level of attraction for surrounding electrons:
kotegsom [21]

Answer:

Oxygen and nitrogen

Explanation:

Oxygen and nitrogen are very electronegative than any other element in the periodic table hence they have more tendency to attract an electron towards itself

6 0
2 years ago
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ollegr [7]
I think the correct answer from the choices listed above is option A. <span>The type of soluble fiber found in oats, barley, lentils, split peas, and beans protects against heart disease. Hope this answers the question. Have a nice day.</span>
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2 years ago
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