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Doctors Medicines MCQs Q&A

Which of the following pollutants causes yellowing and occasional necrosis of leaves, chlorosis of floral buds, inhibition of apical growth, equinasty of leaves, reduced growth and lack of apical dominance ?

Which of the following pollutants causes yellowing and occasional necrosis of leaves, chlorosis of floral buds, inhibition of apical growth, equinasty of leaves, reduced growth and lack of apical dominance ? Correct Answer Ethylene

Related Questions

Four statements followed by three conclusions numbered I, Il and III. You have to assume the given statements to be true even if they seem to be deviate from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements, disregarding commonly known facts. Statements: Some roses are flowers. Some flowers are buds. All buds are leaves. All leaves are plants. Conclusions: I. Some plants are flowers II. Some roses are buds. III. No leaves are roses.
A university library budget committee must reduce exactly five of eight areas of expenditure - I, J, K. L, M, N, O and P - in accordance with the following conditions: If both I and O are reduced, P is also reduced. If L is reduced, neither N nor O is reduced. If M is reduced, J is not reduced. Of the three areas J, K and N exactly two are reduced. If both K and N are reduced, which one of the following is a pair of areas neither of which could be reduced?
A university library budget committee must reduce exactly five of eight areas of expenditure—I, J, K, L, M, N, O and P—in accordance with the following conditions: If both I and O are reduced, P is also reduced.
If L is reduced, neither N nor O is reduced.
If M is reduced, J is not reduced.
Of the three areas J, K, and N exactly two are reduced. Question : If both K and N are reduced, which one of the following is a pair of areas neither of which could be reduced?
Consider the following statements in respect of effect of air pollutants on vegetation: 1. Necrosis refers to killing of tissue 2. Chlorosis refers to loss or reduction of green plant pigment 3. Leaf abscission refers to the dropping of leaves 4. Leaf epinasty refers to a downward curvature of a leaf due to a higher rate of growth on the upper surface Which of the above statements are correct?
Below are given statements followed by two conclusions I and II. You have to take the given statements to be true even if they seem to be at variance from commonly known facts. Statements : Some buds are flowers
All flowers are trees
All trees are leaves Conclusions : I. Some leaves are buds
II. All flowers are leaves Decide which of the below options logically follows the given conclusions.
Five containers of different shapes sphere, cube, prism, cuboid and cylinder have different patterns plain, checkered, floral, polka dots and stripes but not necessarily in the same order. Also each has a different colour blue, green, pink, black and yellow but not necessarily in the same order. The cube and cylinder don't have floral design. Sphere is pink in colour. Prism has checkered design but is not yellow or black in colour. Cuboid is green in colour but doesn't have polka dots or stripes pattern. The plain container is pink in colour. Cube has polka dots and neither blue nor black in colour. Cylinder is not blue in colour. Which container has floral pattern?
If a plant shows extensive interveinal chlorosis of the older leaves and late this reaches the younger leaves, the symptoms is due to lack of
Consider the causes of failure of the Revolt of 1857– 1. Betrayal from ruling Princes and Elites. 2. Lack of capable leader. 3. Lack of determined objectives. Which of the above causes is/are main causes?
What is the exposer of the plant shown during necrosis or chlorosis to high fluoride concentration?
A teacher of Class III had asked children to classify the leaves of the following trees/plants into different groups—lemon, mango, basil, mint, neem, banana, etc. Some students classified leaves as (a) leaves with medicinal values and leaves without medicinal values, (b) big leaves and small leaves. The teacher marked group (a) as right and group (b) as wrong. Which of the following statements reflects the teacher's view of learning and assessment?