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saw5 [17]
3 years ago
13

SOMEBODY HELP NOW PLS!!!WILL GIVE BRAINLIEST!!

Biology
1 answer:
Artist 52 [7]3 years ago
6 0

Answer:

I think that the second picture was correct

Explanation:

gravitational field is a model used to explain the influence that a massive body extends into the space around itself, producing a force on another massive body. Thus, a gravitational field is used to explain gravitational phenomena, and is measured in newtons per kilogram (N/kg)

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Scientists often perform repeated investigations. What is the main reason for this.
VLD [36.1K]
That way they can get the average result and they're usually more accurate.
4 0
3 years ago
You INCORRECTLY perform an acid-fast stain on a smear from a mixed culture of Mycobacterium smegmatis (acid-fast) cells and Stap
Dahasolnce [82]

Answer:

In acid-fast staining, carbon fuchsin is used as a primary stain which dissolves the mycolic acid present in the cell wall of <em>Mycobacterium smegmatis </em>and penetrates through it which results in staining <em>Mycobacterium</em> red.

Staphylococcus aureus cell wall does not contain mycolic acid so carbon fuchsin does not penetrate its cell wall, therefore, it becomes colorless after destaining with acid alcohol.

After destaining step methylene blue is added to stain non-acid-fast bacteria blue. So if I mistakenly forgot to use methylene blue during the procedure <em>Mycobacterium smegmatis</em> will appear red due to carbon fuchsin present in their cell wall and S<em>taphylococcus aureus</em> will appear colorless because it is destained.

5 0
3 years ago
When a person's red blood cells have neither A nor B antigens, what is the blood type of this person?
stepladder [879]
You would have type AB blood type
8 0
3 years ago
Should private industries be able to pay scientists to perform their product safety studies? Why or why not?
erica [24]
So base on the question, I would only say YES, because and experiment must be done in a safe place with a professionals and more importantly it would be safe to all including the people around the factory. I hope you are satisfied with my answer and feel free to ask for more 
6 0
3 years ago
Read 2 more answers
What are the common promoter elements found in eukaryotic genes, and how are they different from enhancer elements?
V125BC [204]

Answer:

In eukaryotic cells you find core and proximal promoters.

Promotors are specific DNA sequences where transcription factors (proteins) and RNA polymerase binds to initiate transcription. Promotors are located upstream the coding sequence

Core promoters are where RNA polymersae binds and proximal promoters are where transcription factors bind.

Enhancer elements are DNA sequences where transcription factors (proteins) bind to increase the rate of expresion of an specific gene. Enhancers can be located either upstream,  downstream or thousands of nucleotids away  from the of the coding region.

Explanation:

Promoters and enhancer are key elements for controling gene regulation. Transcription begins when chromatin rearranges from a condensed state to a accesible state, this allow to transcrition factors and RNA polymerase to  bind specif DNA sequences (promotors).  Proteins bind to enhancers , this complex develops a DNA loop, so that the protein that is bound to the enhancer interacts with the RNA polymersase. When this interaction is made, the activity of the RNA polymerase is increased.

7 0
3 years ago
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