The diagram below shows the flow of food energy between the organisms in a marine ecosystem.

HELP!! DNA was isolated from water samples taken from six different sites. This gel

VladimirAG [237]

After running DNA in a gel, bands of different sizes and species might appear. Scientists know silver carp are at North Shore site 1 because one of the bands in lane 1 matches a band in the positive control (Option C).

When DNA was isolated and run in a gel, many bands migrated to different points.

These bands were the different-sized fragments of DNA samples from different species from the six sites.

Researchers wanted to figure out where the silver carp is.

To do it, they needed to identify the bands on the gel that belonged to the silver carp DNA, so they included negative and positive controls to make comparisons.

<h3>Positive and negative Controls</h3>

Negative and positive controls guarantee the interpretations of the results.

The positive control shows the band sizes that belong to the silver carp DNA.

Any band in the sampling sites that matches one of the positive control bands indicates that the species is present at that site.

The negative control is the opposite. It is the absence of the species' DNA.

<h3>Results interpretation</h3>

As we can see, there are four sites where the bands match one of the bands of the positive control. These are,

North shore site 1
Chicago site 1
Calumet site 1
Calumet site 2

This means that at these four sites, the silver carp is present.

So scientists know silver carp are at North Shore site 1 because one of the bands in lane 1 matches a band in the positive control (Option C).

By looking at the lane of the North Shore site 1, we can also see another band (Thinner and grey). But this band does not match either of the positive control bands. This result suggests that the grey band belongs to another species' DNA.

You can learn more about gel electrophoresis at

brainly.com/question/9437877

brainly.com/question/895793

4 0

2 years ago

#14 & #15 Multiple choice

natka813 [3]

14 should be B if I can remember correctly, 15 is C

5 0

3 years ago

Complete the following sentences to describe the stages of the lytic cycle of viruses. Then, place the stages in chronological o

ddd [48]

Answer:

1. During the__ Attachment ____stage, enzymes digest cell wall and membrane material so that the viral nucleic acids can enter into the host cell.

2. During the ___ Penetration __ stage, the capsid of virus combines with receptors on the host cell's plasma membrane.

3. During the__ Biosynthesis ____stage, viral nucleic acids and capsid components are produced.

4. During the ___ Release __ stage, lysozyme enzyme is produced, is rupturing the cell membrane and releasing viral particles.

5. During the___ Maturation ___stage, viral nucleic acids and capsid components are assembled to produce viral particles.

Explanation:

I have attached picture explanation whole lytic cycle.

6 0

2 years ago

Parasitism could be considered a form of which of these types of relationships? A.Mutualism

BartSMP [9]

The correct answer is

C.Predator-Prey

6 0

3 years ago

Read 2 more answers

Which of the following bacteria can grow in low oxygen environment: Salmonella Yersinia Listria monocytogenes Clostridium botuli

AlexFokin [52]

Answer: Clostridium botulinium

Explanation:

An anaerobic bacteria is an organism which does not require oxygen for it's survival. It may not survive or die in the presence of oxygen. These bacteria are used for the process of fermentation for the preparation of beverage and dairy products.

Clostridium botulinium is the example of the anaerobic bacteria. It is found in soil or marine environment in the form of spores. This bacteria is rod shaped. It forms the spores when the conditions for survival is poor. It causes a disease called as botulism.

6 0

3 years ago