336718
Which one of the following statements can best explain the term critical concentration of an essential element?
1 Essential element concentration below which plant growth is retarded.
2 Essential element concentration below which plant growth becomes enhanced.
3 Essential element concentration below which plant remains in the vegetative phase.
4 None of the above
Explanation:
Critical concentration it he minimum threshold concentration required for proper growth and development. If concentration of essential element fall below this level, growth will be compromised.
NCERT Exemplar
BIOXI12: MINERAL NUTRITION
336719
More than ____ elements, of the 105 discovered, so far are found in different plants.
1 65
2 60
3 62
4 56
Explanation:
More than 60 elements of the 105 discovered so far are found in different plants.
BIOXI12: MINERAL NUTRITION
336720
By some techniques ____ are able to detect the mineral at very low concentration.
1 \(10^{-12} \mathrm{gm} / \mathrm{ml}\)
2 \(10^{-15} \mathrm{gm} / \mathrm{ml}\)
3 \(10^{-10} \mathrm{gm} / \mathrm{ml}\)
4 \(10^{-8} \mathrm{gm} / \mathrm{ml}\)
Explanation:
There are techniques that are able to detect the minerals even at a very low concentration \(\left(10^{-8} \mathrm{~g} / \mathrm{mL}\right)\).
BIOXI12: MINERAL NUTRITION
336721
Assertion : Out of more than 105 elements discovered so far, less than 21 are essential and beneficial for normal plant growth and development. Reason : Essential elements can be grouped into four broad categories on the basis of their diverse functions.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Out of more than 105 elments discovered so far,less than 21 are essential and beneficial for normal plant growth and development, this statement does not explain that essential elements can be grouped into four broad categories on the basis of their diverse functions.
BIOXI12: MINERAL NUTRITION
336722
Most of the minerals present in soil can enter plants through ____
1 Leaves
2 Roots
3 Shoots
4 All of them
Explanation:
Most of the minerals present in soil can enter plants through roots.
336718
Which one of the following statements can best explain the term critical concentration of an essential element?
1 Essential element concentration below which plant growth is retarded.
2 Essential element concentration below which plant growth becomes enhanced.
3 Essential element concentration below which plant remains in the vegetative phase.
4 None of the above
Explanation:
Critical concentration it he minimum threshold concentration required for proper growth and development. If concentration of essential element fall below this level, growth will be compromised.
NCERT Exemplar
BIOXI12: MINERAL NUTRITION
336719
More than ____ elements, of the 105 discovered, so far are found in different plants.
1 65
2 60
3 62
4 56
Explanation:
More than 60 elements of the 105 discovered so far are found in different plants.
BIOXI12: MINERAL NUTRITION
336720
By some techniques ____ are able to detect the mineral at very low concentration.
1 \(10^{-12} \mathrm{gm} / \mathrm{ml}\)
2 \(10^{-15} \mathrm{gm} / \mathrm{ml}\)
3 \(10^{-10} \mathrm{gm} / \mathrm{ml}\)
4 \(10^{-8} \mathrm{gm} / \mathrm{ml}\)
Explanation:
There are techniques that are able to detect the minerals even at a very low concentration \(\left(10^{-8} \mathrm{~g} / \mathrm{mL}\right)\).
BIOXI12: MINERAL NUTRITION
336721
Assertion : Out of more than 105 elements discovered so far, less than 21 are essential and beneficial for normal plant growth and development. Reason : Essential elements can be grouped into four broad categories on the basis of their diverse functions.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Out of more than 105 elments discovered so far,less than 21 are essential and beneficial for normal plant growth and development, this statement does not explain that essential elements can be grouped into four broad categories on the basis of their diverse functions.
BIOXI12: MINERAL NUTRITION
336722
Most of the minerals present in soil can enter plants through ____
1 Leaves
2 Roots
3 Shoots
4 All of them
Explanation:
Most of the minerals present in soil can enter plants through roots.
336718
Which one of the following statements can best explain the term critical concentration of an essential element?
1 Essential element concentration below which plant growth is retarded.
2 Essential element concentration below which plant growth becomes enhanced.
3 Essential element concentration below which plant remains in the vegetative phase.
4 None of the above
Explanation:
Critical concentration it he minimum threshold concentration required for proper growth and development. If concentration of essential element fall below this level, growth will be compromised.
NCERT Exemplar
BIOXI12: MINERAL NUTRITION
336719
More than ____ elements, of the 105 discovered, so far are found in different plants.
1 65
2 60
3 62
4 56
Explanation:
More than 60 elements of the 105 discovered so far are found in different plants.
BIOXI12: MINERAL NUTRITION
336720
By some techniques ____ are able to detect the mineral at very low concentration.
1 \(10^{-12} \mathrm{gm} / \mathrm{ml}\)
2 \(10^{-15} \mathrm{gm} / \mathrm{ml}\)
3 \(10^{-10} \mathrm{gm} / \mathrm{ml}\)
4 \(10^{-8} \mathrm{gm} / \mathrm{ml}\)
Explanation:
There are techniques that are able to detect the minerals even at a very low concentration \(\left(10^{-8} \mathrm{~g} / \mathrm{mL}\right)\).
BIOXI12: MINERAL NUTRITION
336721
Assertion : Out of more than 105 elements discovered so far, less than 21 are essential and beneficial for normal plant growth and development. Reason : Essential elements can be grouped into four broad categories on the basis of their diverse functions.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Out of more than 105 elments discovered so far,less than 21 are essential and beneficial for normal plant growth and development, this statement does not explain that essential elements can be grouped into four broad categories on the basis of their diverse functions.
BIOXI12: MINERAL NUTRITION
336722
Most of the minerals present in soil can enter plants through ____
1 Leaves
2 Roots
3 Shoots
4 All of them
Explanation:
Most of the minerals present in soil can enter plants through roots.
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BIOXI12: MINERAL NUTRITION
336718
Which one of the following statements can best explain the term critical concentration of an essential element?
1 Essential element concentration below which plant growth is retarded.
2 Essential element concentration below which plant growth becomes enhanced.
3 Essential element concentration below which plant remains in the vegetative phase.
4 None of the above
Explanation:
Critical concentration it he minimum threshold concentration required for proper growth and development. If concentration of essential element fall below this level, growth will be compromised.
NCERT Exemplar
BIOXI12: MINERAL NUTRITION
336719
More than ____ elements, of the 105 discovered, so far are found in different plants.
1 65
2 60
3 62
4 56
Explanation:
More than 60 elements of the 105 discovered so far are found in different plants.
BIOXI12: MINERAL NUTRITION
336720
By some techniques ____ are able to detect the mineral at very low concentration.
1 \(10^{-12} \mathrm{gm} / \mathrm{ml}\)
2 \(10^{-15} \mathrm{gm} / \mathrm{ml}\)
3 \(10^{-10} \mathrm{gm} / \mathrm{ml}\)
4 \(10^{-8} \mathrm{gm} / \mathrm{ml}\)
Explanation:
There are techniques that are able to detect the minerals even at a very low concentration \(\left(10^{-8} \mathrm{~g} / \mathrm{mL}\right)\).
BIOXI12: MINERAL NUTRITION
336721
Assertion : Out of more than 105 elements discovered so far, less than 21 are essential and beneficial for normal plant growth and development. Reason : Essential elements can be grouped into four broad categories on the basis of their diverse functions.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Out of more than 105 elments discovered so far,less than 21 are essential and beneficial for normal plant growth and development, this statement does not explain that essential elements can be grouped into four broad categories on the basis of their diverse functions.
BIOXI12: MINERAL NUTRITION
336722
Most of the minerals present in soil can enter plants through ____
1 Leaves
2 Roots
3 Shoots
4 All of them
Explanation:
Most of the minerals present in soil can enter plants through roots.
336718
Which one of the following statements can best explain the term critical concentration of an essential element?
1 Essential element concentration below which plant growth is retarded.
2 Essential element concentration below which plant growth becomes enhanced.
3 Essential element concentration below which plant remains in the vegetative phase.
4 None of the above
Explanation:
Critical concentration it he minimum threshold concentration required for proper growth and development. If concentration of essential element fall below this level, growth will be compromised.
NCERT Exemplar
BIOXI12: MINERAL NUTRITION
336719
More than ____ elements, of the 105 discovered, so far are found in different plants.
1 65
2 60
3 62
4 56
Explanation:
More than 60 elements of the 105 discovered so far are found in different plants.
BIOXI12: MINERAL NUTRITION
336720
By some techniques ____ are able to detect the mineral at very low concentration.
1 \(10^{-12} \mathrm{gm} / \mathrm{ml}\)
2 \(10^{-15} \mathrm{gm} / \mathrm{ml}\)
3 \(10^{-10} \mathrm{gm} / \mathrm{ml}\)
4 \(10^{-8} \mathrm{gm} / \mathrm{ml}\)
Explanation:
There are techniques that are able to detect the minerals even at a very low concentration \(\left(10^{-8} \mathrm{~g} / \mathrm{mL}\right)\).
BIOXI12: MINERAL NUTRITION
336721
Assertion : Out of more than 105 elements discovered so far, less than 21 are essential and beneficial for normal plant growth and development. Reason : Essential elements can be grouped into four broad categories on the basis of their diverse functions.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect
Explanation:
Out of more than 105 elments discovered so far,less than 21 are essential and beneficial for normal plant growth and development, this statement does not explain that essential elements can be grouped into four broad categories on the basis of their diverse functions.
BIOXI12: MINERAL NUTRITION
336722
Most of the minerals present in soil can enter plants through ____
1 Leaves
2 Roots
3 Shoots
4 All of them
Explanation:
Most of the minerals present in soil can enter plants through roots.