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swat32
3 years ago
10

A group of scientists is studying the internal pets of cell.Which microscope is most appropriate for these scientists to use?

Biology
1 answer:
erastova [34]3 years ago
6 0
I would use a Transmission Electron Microscope.
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The study of the similarities and differences in the embryos of different species
grin007 [14]

yes they are quit different in some things


5 0
3 years ago
K.N. is a 24 y.o. woman who presents to the clinic complaining of sudden urgency to urinate, frequent urination, and pain with u
Murrr4er [49]

Answer: Diagnosis: The presence of nitrites in the urine confirms the urinary tract infection.

Explanation:

Treatment: The urinary tract infection will be concerned with the antibiotic therapy to kill the bacteria producing excess nitrites. Educating K.N. about the risk factors associated with the multiple sex partners and transfer of bacteria through sexual contact.

Use of fluroquinolones and nitrofurantoin:

Fluroquinolones: This is an antibiotic which has bacteriocidal property can be useful in the treatment of urinary tract infections.

Nitrofurantoin: It is an effective antibiotic in killing bacteria it gets activated inside the bacteria.

Nitrituria is a condition in which the nitrites are present in the urine that is indicative of the presence of bacterial infection. It is caused by the <em>E. coli</em> bacteria inside the urinary tract. It is responsible for converting the nitrates into nitrites.

3 0
2 years ago
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
What does natural selection mean
sertanlavr [38]

Answer:

The process where organisms naturally go and adapt to enviroment where they can most likely survive and produce more offspring.

Explanation:

Theory was first made by Charles Darwin and is now believed to be the main process that brings about evolution.

6 0
2 years ago
Read 2 more answers
Select all that apply Smaller groupings within a species are called _____.
galina1969 [7]

I'm afraid none of those is correct. The correct option would be subspecies. Subspecies are different variations, one could say, of a same organism.



Hope it helped,


Happy homework/ study/ exam!

7 0
3 years ago
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