Match the following pairs with reference to common air pollutants and its effect/impact on plants and animals:
Pollutant | Associated Effect |
1. Sulphur dioxide | A. Aging in plants. |
2. Oxides of nitrogen | B. Reduces oxygen carrying capacity of blood. |
3. Hydrocarbons | C. Red haze in the traffic. |
4. Carbon monoxide | D. Stiffness of flower buds. |
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In context of ‘Scrub Typhus’, which of the statements given below is/are correct?
1. It is a disease caused by a bacterium and it spreads to people through bites of infected chiggers.
2. Antibiotics are most effective form of medicine to cure this disease.
3. Recently, a special vaccine has been developed for its prevention by the Department of Biotechnology.
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Consider the following statements:
1. Large air cavities are present underneath the skin of aquatic plants that help them in floating.
2. Chlorophyll is present underneath the skin of terrestrial plants and it helps them in manufacturing food.
Which of the statement(s) given above is/are NOT correct?
Consider the following statements with reference to the ‘magnetic field’ of a bar magnet:
1. Magnetic field is a quantity that has both direction and magnitude.
2. Inside the magnet, the direction of field lines is from its south pole to north pole.
3. Magnetic field-lines of two different magnets can intersect each other.
Which of the statement(s) given above is/are correct?
Match the following pairs with reference to different types of ‘Phyla’ with their most distinctive features:
PHYLA | MOST DISTINCTIVE FEATURE |
1. Ctenophora | A. Body segmentation like rings. |
2. Platyhelminthes | B. Comb plates for locomotion. |
3. Annelida | C. Presence of jointed appendages. |
4. Arthropoda | D. Flat body, suckers |
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Consider the following statements:
1. Small intestine is the longest part of the human alimentary canal.
2. Carnivores have a longer small intestine than herbivores.
Which of the statements given above is/are correct?
Consider the following statements:
1. The direction of current is taken opposite to the direction of flow of electrons.
2. Resistance is a property of a conductor that generates heat in the electrical circuit.
3. The SI unit of electric current is Amperes.
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Consider the following statements:
1. Some substances like carbon dioxide or oxygen can move across the cell membrane by a process called Osmosis.
2. In the cell’s external environment, the concentration of carbon dioxide is low as compared to that inside the cell.
Which of the statement(s) given above is/are correct?
With reference to ‘blood’ present in the human body, consider the following statements:
1. It carries oxygen and food to all the cells in human body.
2. It collects wastes from the cells for disposal.
3. It is a type of connective tissue.
Which of the statements given above is/are correct?
Unicellular organism are unique because they are made up of a single cell only. Which of the following is/are examples of unicellular organisms?
1. Amoeba
2. Yeast
3. Bacteria
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Which of the following are the properties of the image formed by a plane mirror?
1. The image is always real and erect.
2. The size of the image is equal to that of the object.
3. The image formed is as far behind the mirror as the object is in front of it.
4. The image is laterally inverted.
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