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oee [108]
3 years ago
11

How does a fish swim

Biology
1 answer:
inna [77]3 years ago
3 0
A fish swims with it's fins and breathes under water with it's gills.
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The group exposed to a newly created drug that is being tested in an experiment is called the ________ group.
weeeeeb [17]
<span>The group exposed to a newly created drug that is being tested in an experiment is called the experimental group.
Whenever any new drug is formed, it is first experimented then it comes in pharmacies for use. Experimental groups are given variables,one variable is tested at a time. After that experimental group is compared to control group.</span>
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3 years ago
Assume that you have 1 mL of a solution of amylase (an enzyme) at a concentration of 15 mg protein/mL. Calculate the volume of d
lidiya [134]

Answer:

42,5 mL

Explanation:

We need to use the serial dilution formula beacuse we start with a stock concentrate solution and we need to prepare a new less concentrated one.

DF=\frac{Vi}{Vf}

<u>DF in the dilution factor, Vi is the initial volume and Vf is the final volume.</u>

The first step is to have the same measurment unit so we need to convert 345 µg to mg.

we know that 1 µg equals 0,001 g, hence:

345 µg = 0,345 mg

now the final volume is 0,345 mg  protein/ mL and the inital volume is 15mg protein/mL, both of them are in the same unit so we can use the formula

DF= \frac{15mg protein/mL}{0.345mg protein/mL}

DF= 43,5 mg protein/ mL

Now since the question said that we already have 1.0mL of the amylase stock solution we need to subtract that 1.0mL to the 43,5 mg protein/mL

43,5mL-1,0mL = 42,5 mL

So, we need 42,5 mL of diluting buffer if we want a final concentration of 345 µg protein/mL (0.345 mg protein/mL)

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3 years ago
What are two negative effects on the carbon cycle of burning coal? explain your answer in terms of resources and climate change.
eduard

Air pollution and limited fresh air

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3 years ago
MANE WHAT DIS IS IM LOST !!
gizmo_the_mogwai [7]

Answer:

I'm not sure exactly what your supposed to do but a,b and c are all correct but d is false.

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What might happen if you didn't have bacteria in your
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Explanation:

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