Chemistry, 26.06.2019 20:00 carlosleblanc26

What is the main function of vacuoles in a plant cell?

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Answer from: stheo

Vacuoles

➡️Plants have single large vacoule as compared to the animals which have many small vacuoles.✔️

➡️The main reason behind this fact are as follows:✔️

Storage:

➡️Plants form the base of the food chain.✔️

➡️They are capable of converting inorganic matter to organic matter.✔️

➡️To store these inorganic ions they are provided with the large vacuoles.✔️

➡️Moreover, plants can not move from one place to another.✔️

➡️So, it is very
easy for a plant to be able to store extra nutrients when they are around for use later when nutrients may not be available✔️

Growth:

➡️Plant cells grow by swelling.✔️

➡️They are provided with a rigid cell wall.✔️

➡️To make this wall expand, plant cells fill their vacuoles to exert pressure from inside.✔️

Answer from: Tyson1191

A) holds water and maintains turgor pressure

Explanation:

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Answer from: Quest

answer: - 3.) the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

solution: - as per the rules, oxidation number of oxygen in its compounds is -2. the sum of oxidation numbers of all the elements of a molecule or compound is zero.

also, the oxidation number in elemental form is zero.

in no, the oxidation number of o is -2 so the oxidation number of n is +2 so that the sum is zero.

similarly, the oxidation number of c in co is +2 and o is -2.

on product side the oxidation number of n is 0 as it is in the elemental form( $n_2$ ) .

oxidation number of c in carbon dioxide is +4 as there are two oxygen in it and we know that each oxygen is -2.

so, oxidation number of n is changing from +2 to 0 and the oxidation number of c is changing from +2 to +4.

since nitrogen is reduced and hence no is acting as an oxidizing agent. carbon is oxidized and so co is acting as a reducing agent.

so, the right choice is number 3.)the oxidation state of nitrogen in no changes from +2 to 0, and the oxidation state of carbon in co changes from +2 to +4 as the reaction proceeds.

Answer from: Quest

the balanced equation for reaction of ca metal with o2 to produce cao is as below

2 ca+ o2→ 2 cao2

explanation

the reaction is balanced since the number of atoms in reactant side is equal to number of atoms in product side. for example they are 2 atom of ca in reactant side and 2 atoms of ca in the product side.

the process is a meet the requirement of redox reaction because : calcium is oxidized from oxidation state 0 to 2+ while oxygen is reduced from oxidation state 0 to 2-

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