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padilas [110]
3 years ago
11

How many americans suffer health disorders each year from smoking tobacco?

Biology
2 answers:
aev [14]3 years ago
6 0
More than 16 million Americans
Marina86 [1]3 years ago
4 0
More than 15-16 million americans which is terrible
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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. <em>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). </em>

<h2>Gel</h2>

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.

<em>Researchers wanted to figure out where the silver carp is. </em>

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.

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

  • 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,

  1. North shore site 1
  2. Chicago site 1
  3. Calumet site 1
  4. Calumet site 2

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

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

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
A plant makes glucose during photosynthesis. Glucose consists of the elements carbon, hydrogen, and oxygen. What is the source o
podryga [215]

Answer:

Glucose is produced by plants through photosynthesis. In this process, the plant uses light energy from the Sun to convert carbon dioxide and water into glucose and oxygen. Algae and certain bacteria and other unicellular organisms also produce glucose through photosynthesis.

Explanation:

5 0
2 years ago
How large may an air mass be?
denis23 [38]
Everything has mass. The mass of something never changes. 

Mass is measured using grams.

Air is not that heavy, but it certainly has mass because it takes up space.

For every one liter of air, their is 1.19 grams. 
3 0
3 years ago
The equations represent chemical reactions that take place in living organisms.Which reaction releases the greatest amount of en
pav-90 [236]

Answer:

second one

Explanation:

the second one is aerobic respiration which creates alot of energy

4 0
2 years ago
Which kind of animals has the largest natural breasts?
GenaCL600 [577]

ANSWER:

In the animal kingdom mammals have largest natural breasts.

EXPLANATION:

Mammals have largest breasts in animals and specifically Blue Whale has the largest breasts but they are inside the body.Among other animals goats, cows and buffaloes have larger breasts too but surely not greater than the size of Blue Whale's.Breasts are organs in which mammary glands are present, these glands produce milk.

5 0
2 years ago
Read 2 more answers
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