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vlabodo [156]
3 years ago
15

Mira analyzed oxygen and carbon dioxide in inhaled and exhaled air. She found that the percentages of both gases were different

Biology
1 answer:
sashaice [31]3 years ago
6 0

Answer:

ozone

Explanation:

found in the atmosphere

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Study the map. Which plate forms a boundary with the African Plate?
Yuki888 [10]

Answer:

down below

Explanation:

The western edge of the African Plate is a divergent boundary with the North American Plate to the north and the South American Plate to the south which forms the central and southern part of the Mid-Atlantic Ridge.

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3 years ago
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Why are some bacteria referred to as indicator microorganisms in ascertaining microbial quality control of products?
Nostrana [21]

Answer:

Some bacteria are used as indicators because if they are present in the product, we can say that it is a product with the presence of pathogens that will cause diseases. Some of them are: total coliforms, fecal coliforms and enterococci.

To be a good indicator they must have a correlation with the pathogens and be more abundant than them. Its presence in a food indicates the possible presence  simultaneous pathogen microorganisms. For example, E. coli has been used as  Index of possible presence of pathogens of enteric origin in water and food

3 0
3 years ago
What the answer to this
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This answer to this question is true
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3 years ago
A pharmacist has two vitamin-supplement powders. The first powder is 10% vitamin B1 and 30% vitamin B2. The second is 15% vitami
Basile [38]

Answer:

560 mg of powder 1 and 160 mg of powder 2

Explanation:

Let "X" denotes weight of powder 1 added to the new mixture and  "Y" denotes weight of powder 2 added to the new mixture

Total weight of vitamin B1 in the mixture is equal to 80 mg

Total weight of vitamin B2 in the mixture is equal to 200 mg

Equation 1

0.1 X + 0.15 Y= 80

Equation 2

0.3 X + 0.2 Y= 200

Let us simplify the above two equations, we will get

10 X + 15 Y = 8000\\3X + 2Y = 2000

2 (10 X + 15 Y = 8000), 20X + 30 Y = 1600015(3X + 2Y = 2000), 45X +30Y = 30000\\25 X = 14000\\X = 560

Substituting value of X in equation 2 we get

0.3 * 560 + 0.2 Y = 200\\0.2 Y = 200 - 168\\Y = 160

7 0
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How do fungi play an essential role in maintaining equilibrium in an ecosystem?
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