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Klio2033 [76]
3 years ago
12

Elements in group ________ are common alkaline earth metals. Answer ?

Biology
1 answer:
omeli [17]3 years ago
3 0
The answer is:  "2A" or "IIA" or "2" or "II"; 
___________________________________
In which "II" stands for the Roman numeral representing the number: "2 (two)".
________________________________________________________
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After the gram staining procedure, you realized you went too fast and have forgetten to apply the 95% ehtanol. What might be the
LekaFEV [45]

Answer:

In gram staining, 95% ethanol is used to destain the gram-negative bacteria but gram-positive bacteria do not get destain because peptidoglycan layer in gram-positive cell wall does not allow crystal violet- iodine complex to come out of the cell wall.

Gram-negative bacteria do not have peptidoglycan cell wall and so crystal violet comes out of the cell wall by using 95% ethanol because ethanol dissolves the lipopolysaccharide membrane of gram-negative bacteria and allow the dye to leak out.

Therefore if I forgot to apply 95% ethanol than crystal violet dye will not come out of the lipopolysaccharide cell wall of gram-negative bacteria and it will appear violet under the microscope.

4 0
3 years ago
What goes into the photosystems and what comes out of the systems. where will these products go?
Elanso [62]
Carbon goes in oxygen comes out and the oxygen goes into animals and carbon come out of animals
6 0
3 years ago
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If anyone knows this please let me know and explain??
weqwewe [10]

Answer:

I am pretty sure the answer is Melting

Explanation:

7 0
3 years ago
Read 2 more answers
1. Populations can have variety, despite being made up of the same species. If a population has different expressed traits, this
fgiga [73]
Natural Selection proposes that organisms that are better adapted to their environment are able to survive and reproduce.

Even though these frogs are the same species, their shades of green is what helps them to survive in their habitat. In this case, frogs with a lighter shade of green are able to be seen by predators easier, whereas frogs with darker shades are able to blend in (camouflage) more with their surroundings. After a period of time, due to them being easily seen, lighter-shaded green frogs will die off.

To anseer your question, natural selection would have a gradual affect on the frequency of the alleles. Lighter-green allele frequencies would eventually cut off, and darker-green allele frequencies will increase.

Hopefully the following image will help:
As seen in the image, (please forgive the quality, as I had drawn this on some random kids drawing site on the internet...) you can see the affects of natural selection on the allele frequencies. The brighter-green shades gradually decrease over time, as the darker shades increase.

Hope you find this helpful.

8 0
3 years ago
Trey stands on one side of a filing cabinet and pushes with a force of 30 N. If Mary wants
tester [92]
Balanced forces are forces that are equal in force but opposite sides. Mary would need to push on the opposite side of Trey with the same force of 30N. (I provided a photo to visualize)

4 0
3 years ago
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