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alexandr402 [8]
2 years ago
5

Closed systems in

Biology
1 answer:
faltersainse [42]2 years ago
6 0

Answer:

option A is the correct answer of given statement rare because most matter + and in flow of constant energy to survive

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Primary storage site for most fat soluble vitamins
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This happens mostly in the adipose and liver.
5 0
4 years ago
Compare the practices of shelterwood cutting, clearcutting, and seed-tree cutting.​
Kazeer [188]

Answer:

Clearcutting removes all the trees within a certain area at one time. Shelterwood cutting also removes all the trees in an area, but does it in stages over several years. Seed-tree cutting removes all the trees except for a select number of mature trees that can then reseed the area.

Explanation:

Hope that helps!

4 0
3 years ago
Organize the parts of this body system in the CORRECT order according to the levels of organization in a multicellular organism,
Snezhnost [94]

Answer:

I believe its C

Explanation:

A neuron is what makes up an atom, so a neuron would go first, then nerve tissue, central nervous system, and then finally human being.

<em>have an amazing day</em>

3 0
3 years ago
What is the primary mechanism associated with the role of fluoride in prevention of dental caries?​ a. ​Fluoride increases calci
MAXImum [283]

Answer:

d. ​Fluoride becomes incorporated into the crystalline structure of teeth, making them less susceptible to decay

Explanation:

Dental caries results when cariogenic (caries-causing) bacteria metabolize carbohydrates or sugars present in the mouth for their energy needs, producing organic acids as byproducts, thus lowering the pH of the plaque biofilm.

The hydroxyapatite of tooth enamel is composed mainly of phosphate ions (PO₄³⁻) and calcium ions (Ca⁺). Under normal conditions, there is a stable equilibrium between the calcium and phosphate ions in saliva and the crystalline hydroxyapatite. At low pH (acidic conditions), there is a shift in equilibrium resulting in the dissolution of hydroxyapatite from tooth enamel, a process known as demineralization. A reverse process called remineralization (the process of incorporation of minerals in tooth enamel) occurs when the saliva, acting as a buffer elevates pH. When equilibrium is shifted to favor continued demineralization, dental caries results.

However, when fluoride is present in saliva, fluorapatite, rather than hydroxyapatite, forms during the remineralization process as fluoride ions replace hydroxyl groups in the formation of the apatite crystal lattice.

Fluorapatite is less soluble than hydroxyapatite making it more resistant to demineralization, even under conditions of low pH. Thus, fluoride acts as an effective anticaries agent.

7 0
3 years ago
What is the role of RNA polymerase? ​​
VladimirAG [237]

Answer:

an enzyme that is responsible for copying a DNA sequence into an RNA sequence, duyring the process of transcription. ... For example, all species require a mechanism by which transcription can be regulated in order to achieve spatial and temporal changes in gene expressio

Explanation:

according to Google

6 0
3 years ago
Read 2 more answers
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