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Mariulka [41]
3 years ago
7

PLEASE HELPPP

Biology
1 answer:
IRINA_888 [86]3 years ago
4 0

Explanation:

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Arteries are normally depicted as red while veins are colored blue due to the oxygenation of the blood being transported by each
Bogdan [553]
The exceptions to this rule are the pulmonary arteries and veins.  
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3 years ago
The endocrine system sends chemicals called __________ through the __________ to change short-term and long-term activities in t
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Answer: The endocrine system sends chemicals called hormones through the bloodstream to change short-term and long-term activities in the body

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2 years ago
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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A new organism begins to form when egg and sperm cells join in the process called fertilization
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