Biology
Given below is a representation of a type of pollution. Study the picture and answer the questions:
(i) Name the type of pollution shown in the picture.
(ii) Name one source of this pollution.
(iii) How does this pollution affect human health?
(iv) Write one measure to reduce this pollution.
(v) State one gaseous compound that leads to the depletion of the ozone layer and creates 'Ozone holes'.
Pollution
ICSE 2018
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Answer
(i) Air pollution is shown in the picture.
(ii) The exhaust given out by petrol/diesel vehicles.
(iii) Air pollution causes respiratory problems, lung disorders. Particulate lead may cause blood cell shortage. Smog leads to asthma and allergies. The exhaust gas SO2 causes serious damage to the air passages in lungs (the disease bronchitis).
(iv) Use of unleaded petrol and CNG in automobiles.
(v) Chloro fluoro carbon
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Related Questions
Correct the following statements by changing the underlined words:
(i) Normal pale yellow colour of the urine is due to the presence of the pigment Melanin.
(ii) The outermost layer of Meninges is Pia mater.
(iii) The cell sap of root hair is Hypotonic.
(iv) Xylem transports starch from the leaves to all parts of the plant body.
(v) Nitrogen bonds are present between the complementary nitrogenous bases of DNA.
Choose between the two options to answer the question specified in the brackets for the following:
An example is illustrated below.
Example: Corolla or Calyx (Which is the outer whorl?) Answer: Calyx
(i) Blood in the renal artery or renal vein (Which one has more urea?)
(ii) Perilymph or endolymph (Which one surrounds the organ of Corti?)
(iii) Lenticels or stomata (Which one remains open always?)
(iv) Sclerotic layer or choroid layer (Which one forms the Iris?)
(v) Blood in the pulmonary artery or pulmonary vein (Which one contains less oxyhaemoglobin?)
Choose the ODD one out from the following terms given and name the CATEGORY to which the others belong:
Example: Nose, Tongue, Arm, Eye
Answer: Odd Term – Arm, Category – Sense organs
(i) Detergents, X-rays, sewage, oil spills
(ii) Lumen, muscular tissue, connective tissue, pericardium
(iii) Dendrites, Medullary Sheath, Axon, Spinal cord
(iv) Centrosome, Cell wall, Cell membrane, Large vacuoles
(v) Prostate gland, Cowper's gland, seminal vesicle, seminiferous tubules.
The diagram given below represents a stage during cell division. Study the same and answer the questions that follow:
(i) Identify whether it is a plant cell or an animal cell. Give a reason in support of your answer.
(ii) Name the stage depicted in the diagram. What is the unique feature observed in this stage?
(iii) Name the type of cell division that occurs during:
- Replacement of old leaves by new ones.
- Formation of gametes.
(iv) What is the stage that comes before the stage shown in the diagram?
(v) Draw a neat, labelled diagram of the stage mentioned in (iv) above keeping the chromosome number constant.