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2 years ago

What is the difference between an atom of silver and anatom of gold?

1 answer:

eduard2 years ago

6 0

The right answer is C. I think, a. and d. are obviously not serious. B is not true, because Ag and Au are in the same group in the periodic table and therefore have the same number of electrons in the last level. So, they form ions with the same charge. C is true beacause Ag and Au have different numbers in the periodic table and different amount of protons and neutrons in their nucleuses.

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Griculture: Mastery Test

enot [183]

Answer:

1. Isabella wanted

2.She read and reviewed

3.She constructed a hypothesis

4.She submitted her proposal

5.Control groups

6.She collected

7.She reached a conclusion

8.she presented

Explanation:

I got it right

4 0

2 years ago

Verizon [17]

Cellulose makes the cell walls of all plant cells.

Option B

<h3><u>Explanation:</u></h3>

Enzymes are biomolecules that act as biocatalysts and to enhance the rate of a chemical reaction. Lipids and proteins make up the cell membrane bilayer. Cholesterol is a lipid molecule that comes under the category of very low density lipoprotein. Its not associated with storing the genetic information. The DNA stores the genetic information.

Glucose is the chief respiratory substrate of a cell. Its not associated with the increase in rate of a reaction. But cellulose is the molecule that is a polymer of glucose that is associated with the formation of cell walls in plants.

5 0

2 years ago

Each of the following statements describes a type of column chromatography. Sort the statements to the type of chromatography th

horsena [70]

Answer:

Explanation:

Separate molecules by size. > All

Separate molecules by charge. > Ion-exchange Chromatography, Affinity Chromatography

The stationary phase has a covalently bound group to which a protein in the mobile phase can bind. > All

Uses a mobile phase and a stationary phase to separate proteins. > All

The stationary phase contains cross-linked polymers with different pore sizes. > Size-exclusion Chromatography

Can separate molecules based on protein-ligand binding. > Affinity Chromatography

The stationary phase may contain negatively or positively charged groups. > Ion-exchange Chromatography, Affinity Chromatography

7 0

2 years ago

Pseudomonas A. are resistant to many disinfectants and antimicrobials.B. are mostly harmless except for the opportunistic P. aer

OLga [1]

Answer:

The best answer is option E.

Explanation:

Pseudomonas are gram-negative bacteria which is present almost everywhere air, soil, water and even indoors. These gammaproteobacteria are also present in some of the healthy people.

Pseudomonas is resistance to many antimicrobials and disinfectants. These bacteria are generally harmless but some opportunistic species like P. aeruginosa are infectious.

Thus, the correct answer is option E.

6 0

3 years ago

What is the difference between water mollusks and land mollusks

sleet_krkn [62]

Answer:

Well water mollusks live underwater and land mollusks live on land

Explanation:

6 0

2 years ago