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leonid [27]
3 years ago
7

1. What common characteristics do you notice in all the marine ecosystems? What are some major differences?

Biology
1 answer:
nataly862011 [7]3 years ago
5 0

Answer:

Marine ecosystems are characterized by factors such as availability of light, food and nutrients. Other factors that affect marine ecosystems include water temperature, depth and salinity, as well as local topography. Changes in these conditions can change the composition of species that make up the marine community.

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When is the lac operon most active?
Vera_Pavlovna [14]

Answer: The correct answer to the question is option WHEN GLUCOSE LEVELS ARE LOW AND LACTOSE IS PRESENT.

Explanation: To start with,Lac operon can be simply defined as a part of the DNA that is under the part of the DNA is manipulated and controlled by the same promoter,they can be found in some prokaryotic cells giving room for regulation over excess synthesis of protein.so simply put,these specific segment of the DNA binds with the segment of the polymerase of RNA so that transcription of the mRNA from the operon genes will be achieved.

Lac operon is also known as lactose operon, it is seen in some enteric bacteria like e.coli where they play a crucial role in coding of genes for those proteins that function in moving lactose into the cystocel and digesting it to form glucose that is used for energy generation. These lac operon are are most active when glucose levels are low and lactose is present,with the low level of glucose, the lac operon can be transcribed to a high level,this is to ascertain that the bacteria only gets to activate the lac operon and can only make use of it,that is using lactose when all the preferred energy source from glucose has been exhausted.

6 0
3 years ago
Which of the following is the best definition of a scientific theory?
Verdich [7]

Hi there! I believe the answer is:

D. An explanation of natural events that is well supported by scientific evidence

I hope this helps :)

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3 years ago
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ziro4ka [17]
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Ozone intake can cause irritation in what system of the body?
Svetradugi [14.3K]
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3 years ago
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