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Allushta [10]
2 years ago
15

Which statement best describes a sustainable mining or drilling technique?

Biology
1 answer:
nikklg [1K]2 years ago
4 0

Answer:

drill rigs use more diesel fuel instead of coal

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Refer to the chart of amino acid structures to help answer this question. Which four statements about amino acids are true? Ser
Bad White [126]

Answer:

1. Ser and Gln are polar amino acids.

2. The Leu side chain does not form hydrogen bonds with other amino acids.

3. Phe can undergo oxidation to form Tyr.

4. Lysine has one stereocenter (chiral center).

Explanation:

Serine and glutamine are the polar amino acids with uncharged side group. Serine has a "CH2OH" group as its side chain and the presence of hydroxyl group makes it a polar amino acid. Glutamine is one of the amides derived from other amino acids present in proteins.  

Leucine is a nonpolar amino acid with an aliphatic side chain and tends to cluster within the proteins to stay away from the surrounding watery medium. Its aliphatic R group does not form any hydrogen bonds to other amino acids.  

Phenylalanine is a nonpolar amino acid with an aromatic R group. Oxidation of aromatic R group of phenylalanine converts it into tyrosine which has an additional hydroxyl group in its side chain.

The chiral center is the carbon to which four different functional groups are bonded. The central alpha carbon atom of lysine is bonded to an amino group, carboxyl group, a hydrogen atom, and one positively charged R group which in turn makes it a chiral center.  

4 0
3 years ago
Which part of the ear receives vibrations directly from the eardrum? cochlea hammer stirrup anvil
Yuri [45]
Cochlear duct(Scala media)

the portion of membranous labyrinth within the cochlea filled with fluid that vibrates when sound waves are transmitted by the stapes. (between scala vestibuli and scala tympani)

6 0
3 years ago
Do homologous structures always have the same function in different organisms?
dimulka [17.4K]

Answer:

Homologous structures are structures that are similar in related organisms because they were inherited from a common ancestor. These structures may or may not have the same function in the descendants.

My answer uh might not be the one you're looking for or isn't correct ✌

Explanation:

3 0
3 years ago
Read 2 more answers
Please help me... The advantages of soaking pineapple slices in a concentrated sugar solution compared to storing fresh pineappl
Alekssandra [29.7K]

Answer:

Answer:

Advantage: Bromelain. Adding pineapple

to your meals or desserts may help you

digest your food better....

Disadvantage: Sugar. If you have

diabetes, pineapple may cause a spike in

your blood sugar. ...

Advantage: Vitamins and Minerals. ...

Disadvantage: Skin Irritation.

hope this helps:)

6 0
2 years ago
B-lymphocytes are categorized as part of the adaptive branch of the immune system for all of the following reason but one. Which
elixir [45]

Answer: B. They are a first line of defense that can begin killing pathogens immediately.

Explanation:

B-lymphocytes are not the first line of defense. On the contrary, innate immune cells such as basophils, dendritic cells, eosinophils, Langerhans cells, mast cells are the body's first line of defence.

4 0
3 years ago
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