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Ratling [72]
3 years ago
12

Molten lava pours from a volcano in Hawaii. After a few hours the liquid lava hardens into a shiny gray rock as thermal energy i

s removed. Which phase change has taken place
Biology
1 answer:
julsineya [31]3 years ago
8 0

<u>Answer</u>: freezing

Freezing is defined as the process through which a substance changes its from from a liquid to a solid. As the liquid lava in the example has lost its thermal energy and thus has hardened, the phase change through which it has undergone is freezing. All liquids with the exception of helium undergo freezing then the average energy of the molecules decreases.

Solidification is another term often used to describe this phenomenon. However, it is much more general and can occur due to other factors such as reactions between different chemicals.

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In general, why might cell-wall inhibiting antimicrobial drugs be less effective on gram-negative bacteria compared to gram-posi
asambeis [7]

Cell-wall inhibiting antimicrobial drugs be less effective on gram-negative bacteria compared to gram-positive bacteria because the outer membrane of the gram-negative bacteria inhibits penetration of the drug and the peptidoglycan found in gram-positive bacteria is structurally different from that in gram-negative bacteria.  

Answer: Option B & C

<u>Explanation:</u>

Antimicrobial drugs are induced into a body to act on that particular selective bacterium which causes disease. When antimicrobial drugs are injected they act efficiently on the gram positive bacteria inhibiting the proliferation of the cells by acting on the cell wall so that cell multiplication doesn’t happen.

On the other hand it is hard to act on the gram-negative bacteria as it has a cell membrane that inhibits drug penetration into it. Both cell walls contain peptidoglycan but in the gram-positive is more assembled and layered while in the gram-negative it is just a thin layer. As gram-positive is thick layered it provides place for another molecule to attach to it but the thin layer in gram-negative inhibits it.

4 0
3 years ago
(first one to answer gets brainliest!), What % of wind energy does the United States use?
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Answer:

Although wind makes up about 8% of total U.S. electricity generating capacity, wind generators provided a smaller share (5%) of total U.S. electricity generation in 2016 because wind turbines have relatively low capacity factors.

Explanation:

3 0
2 years ago
During which phase mitosis do the nuclear membrane nucleolus and dissolve
Lisa [10]

Prophase is the right answer

5 0
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Which three minerals are most likely used in the construction of a house?
Ahat [919]

Answer:

lead pencils (graphite)

fertilizer (potassium, sodium, calcium)

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flashbulb (zirconium)

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Explanation:

3 0
2 years ago
A eukaryote has cells that do not contain a nucleus, whereas a prokaryote has cells that have a nucleus.
kap26 [50]

✧・゚: *✧・゚:*    *:・゚✧*:・゚✧

                  Hello!

✧・゚: *✧・゚:*    *:・゚✧*:・゚✧

❖ This statement is false.

PROKARYOTE cells are cells that don't contain a nucleus, whereas a EUKARYOTE has cells that have a nucleus.

~ ʜᴏᴘᴇ ᴛʜɪꜱ ʜᴇʟᴘꜱ! :) ♡

~ ᴄʟᴏᴜᴛᴀɴꜱᴡᴇʀꜱ

3 0
3 years ago
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