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sladkih [1.3K]
3 years ago
7

List 2-3 examples of good things bacteria do for us

Biology
1 answer:
Dafna1 [17]3 years ago
3 0

Answer:

1 They can help the digestive system break down food

2 they can help you fight off germs

Explanation:

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A certain buffer is made by mixing a weak acid HA and its conjugate base A–. When HA is present at a concentration of 0.5 mM and
MAVERICK [17]

Answer:The ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02 is 0.69

Explanation:

The dissociation constant for formic acid = K_a=1.8\times 10^{-4}

Concentration of HA= 0.5 mM

Concentration of A^-= 0.1 mM

pH = 6.16

First we have to calculate the value of K_a.

Using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[A^-}{[HA]}

Now put all the given values in this expression, we get:

6.16=pK_a+\log (\frac{[0.1]}{0.5})

pK_a=6.86

To calculate the ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02.

Using Henderson Hesselbach equation :

7.02=6.86+\log \frac{[A^-]}{[HA]}

7.02=6.86+\log \frac{[A^-]}{[HA]}

\frac{[A^-]}{[HA]}=1.44

\frac{[HA]}{[A^-]}=0.69

Thus the ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02 is 0.69

7 0
3 years ago
Helllppppppp!!!!!!! I need the answer
pav-90 [236]

Answer:

0 just count all the atoms

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Explanation:

3 0
2 years ago
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Which describes water cycling through living things?
IrinaVladis [17]
Water and nutrients are constantly being recycled through the environment. This process through which water or a chemical element is continuously recycled in an ecosystem
5 0
3 years ago
There are millions of different species of animals, plants, and microorganisms. Which of the following factors do biologists con
ddd [48]

The answer is A. Morphology/anatomy is considered more relevant than behavior or general appearance in the classification of organisms. It is due to these anatomical features that animals such as bats are classified differently from birds (with bats classified as mammals even though they fly like birds) due to differences in anatomical features like milk-producing glands and brain structure.






8 0
3 years ago
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Desert plants are most likely to have which adaptation? A. a thick, waxy covering to prevent evaporation B. large amounts of chl
nekit [7.7K]

Answer:

A. A thick, waxy covering to prevent evaporation.

Explanation:

Because the desert is usually dry and hot, plant that live in these ecosystems need to adapt to the environment to prevent the loss of water. Water escapes from plants through their leaves as a result of photosynthesis. Desert plants have special adaptations to at least reduce the loss of water and one of them is the thick waxy covering of the leaves to seal in the water.

8 0
3 years ago
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