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svetlana [45]
3 years ago
8

Once ice forms on a lake in winter, the water underneath the ice remains about 4 c even if the air temperature just above the ic

e far below freezing. What property of water helps keep the water below the ice from freezing?
Biology
1 answer:
enyata [817]3 years ago
7 0

Answer:

Hydrogen bonding. When the ice freezes, it becomes less dense and floats to the top. this insulates the water keeping it from freezing.

Explanation:

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5 0
2 years ago
Why are antibiotics effective in curing diseases against some pathogens but not others?
Leya [2.2K]

Answer:

The correct answer is "I, II, and III".

Explanation:

The missing options of this question are:

I only

II only

III only

I, II, and III

The correct answer is "I, II, and III".

Antibiotics are of different spectrums of activity depending on the number of pathogens they can kill. They are different reasons for this differences in antibiotic specificity:

I. Antibiotics interrupt processes found in some but not all pathogen cells. For instance, some antibiotics are directed to cell walls that not all bacteria posses.

II. Some pathogens have no metabolic processes to interrupt. The antibiotics that are directed to metabolic reactions of bacteria are not effective in treating viruses because they do not perform this metabolic reactions.

III. Some pathogens have developed genetic resistance to specific antibiotics. Bacteria have a remarkable genetic plasticity having plasmids that can be easily transmitted among them, which give them antibiotic resistance.

7 0
3 years ago
nitrogen gas reacts with hydrogen gas to form ammonia.what are the reactants in this chemical reactions
Lera25 [3.4K]

The formula for this reaction would be

N + H3 ---> NH3

The first part of the reaction are the reactants and the second part is the product.

The reactants of this reaction are N and H3.

Or you could say the reactants are nitrogen and hydrogen

6 0
3 years ago
What are the raw materials of water?
LuckyWell [14K]
There are different materials of raw water, but also the raw water comes from ponds,rivers, and oceans but they might be good sometimes, and gas not been treated and has bacteria or mold buy that is not good.
6 0
3 years ago
Read 2 more answers
Can someone help me please
Ostrovityanka [42]

Answer:

J) Providing information to form proteins

Explanation:

Messenger RNA (mRNA) is the molecule that links genes to proteins. Efficient and smooth interactions of the molecules of life allow us humans to function well. ... This process is called gene expression.

4 0
2 years ago
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