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mart [117]
3 years ago
10

Populations of organisms have many genetic variations. Where do these come from?

Biology
1 answer:
Kamila [148]3 years ago
6 0
Usually from a mutation in the genetic code
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Give three reasons why you might have a situation in which bacterial colonies were found on the first section of a streak plate,
Agata [3.3K]

Hi. You have not shown the sections this question refers to, nor have you provided more information about those sections. This makes it difficult for your question to be answered. However, I will try to help you as best I can.

Generally speaking, we can consider that there was no growth of bacterial colonies in sections 2 and 3, because, for some reason, the bacteria was not inoculated in sections 2 and 3. What could also have happened, is that the bacteria in the sections 2 and 3 were eliminated, but the bacteria from section 1 managed to survive and form colonies.

Another possibility is that after inoculating the bacteria in section 1, you didn't handle the bacteria correctly in the other sections, leaving that bacteria to dry out and die.

Finally, the culture media in sections 2 and 3 could be inappropriate for bacteria to develop and form colonies.

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3 years ago
Introducing a vascular catheter directly into a vessel without further advancement past the punctured vessel is called _________
Alex_Xolod [135]

It is called central vascular catheterization

<h3>Importance of catheterization</h3>

Catheterization is defined as the use of medical devices that can be inserted into the body and used for different medical purposes.

Vascular catheterization is a peripheral catheterization that is used to detect certain upper and lower peripheral extremity conditions.

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Central vascular catheterization involves Introducing a vascular catheter directly into a vessel without further advancement past the punctured vessel.

Learn more about catheterization here:

brainly.com/question/3911876

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2 years ago
Which of the following is NOT true about “yield”? a. the value of the actual yield must be given in order for the percent yield
Law Incorporation [45]
The right answer for the question that is being asked and shown above is that: "b. the act<span>ual yield may be different from the theoretical yield because reactions do no always go to completion." This is the statement that is not true about "yield."
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8 0
3 years ago
What does the law of conservation of energy state?
Lelechka [254]
B is right

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3 years ago
Around how long is the longest fragment of baby guppy DNA?​
ryzh [129]

Answer:

<em><u> One-fourth of an inch long</u></em>

Explanation:

I hope that helps!!! :)

6 0
3 years ago
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