Consider the following statements about the ‘scattering of light’:
1. Very fine particles scatter mainly blue light while particles of larger size scatter light of longer wavelengths.
2. If the size of the scattering particles is large enough, then, the scattered light may even appear white.
Which of the statements given above is/are correct?
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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?
Weeds are unwanted plants in a cultivated field. In this context, consider the following statements:
1. The weeds compete for food, space and light.
2. Weeds are responsible for affecting the growth of the crop.
3. Timely sowing of crops and crop rotation help in weed control.
Which of the statement(s) given above is/are correct?
Which of the following diseases and their causative agents is NOT correctly matched?
Disease | Causative Agent |
1. Ringworms | Fungi |
2. Amoebiasis | Protozoan |
3. Plague | Bacterium |
Select the correct answer using codes given below:
In context of cells in the human body, consider the following statements:
1. The shape and size of cells are related to the specific function they perform.
2. A cell is able to live and perform all its functions because of its components known as organelles.
3. All cells present in human body have the same organelles.
Select the correct answer using the code given below:
Consider the following statements:
1. The motion of the moon around the earth is due to the centrifugal force.
2. The moon rotates around its axis due to the gravitational pull of the earth.
Which of the statement(s) given above is/are NOT correct?
The most common nutrients causing eutrophication are:
Fertilizers are commercially produced plant nutrients. In this context, consider the following statements:
1. Fertilizers get washed away due to excessive irrigation.
2. Micro-organisms in the soil are harmed by the continuous use of fertilizers.
3. Fertilizers supply nitrogen, phosphorus and sodium to the soil.
Select the correct answer using the code given below:
Read the following statements carefully:
1. Motion of the moon around the earth.
2. Tides in open seas.
3. Rotation of earth.
4. Motion of planets around the Sun.
Which of the events given above are result of force of ‘Gravitation’?
Which of the following statement(s) about Acquired Immuno Deficiency Syndrome (AIDS) is/are correct?
1. AIDS is a congenital disease caused by a retrovirus known as Human Immuno deficiency Virus (HIV).
2. AIDS is characterised by a progressive decrease in the number of T-lymphocytes in the body of the infected person.
Select the correct answer using the code given below.
Consider the following statements:
1. Cold-blooded animals do not have the capacity to regulate their body temperature.
2. Amphibians are cold-blooded animals and reptiles are warm-blooded animals.
Which of the statements given above is/are correct?