Biology Unsolved Sample Paper Solutions ICSE Class 9
(i) (c) Alveoli
Trachea ends at alveoli, sac like structures where the gas exchange occurs.
(ii) (c) Phloem parenchyma
Phloem parenchyma is absent in most of the monocots and some herbaceous dicots.
(iii) (b) Stratified squamous epithelium
Stratified squamous epithelium is a lining tissue, provides protection for underlying tisseues and that’s why are found in area of regular wear and tear.
(iv) (a) Ethyl alcohol
Via a mechanism known as fermentation, yeast is used to manufacture alcohol. As a by-product, the yeast ferments the sugar or starch to produce alcohol.
(v) (c) Premolars, molars – Grinding
(vi) (d) Carotene
Carotenes are plant pigments responsible for bright red, yellow and orange colour in many fruits and vegetables.
(vii) (d) Androecium and Gynoecium are absent
The flowers in which both androecium (male reproductive structure) and gynoecium (female reproductive structure) are absent are called neuter flowers. Example - ray florets of sunflower.
(viii) (d) endosperm gets used up by the developing embryo during seed development.
In gram and peas, the endosperm gets used up at the time of development seed. So, seed is nonendospermic, i.e., endosperm is not present in the mature seed.
(ix) (c) Tuberculosis
Streptomycin is an antibiotic medication used to treat a number of bacterial infections, including tuberculosis.
(xi) (c) From exposure to the diseases organism through infection
Natural immunity is acquired from the exposure to the diseases organism through infection with the actual diseases.
(xii) (b) Can remove gases like sulphur dioxide
A scrubber can remove gases like sulphur dioxide. In a scrubber, the exhaust is passed through a spray of water or lime water. Water dissolves gases. The particles also become heavy and fall down.
(xiii) (c) Adipose tissue
Adipose tissues are the tissues specialised in storing energy as fat.
(xiv) (d) Montoux test
The Montoux Tuberculian Skin Test (TST) or the TB blood test can be used to test for tuberculosis infection. This test is performed by injection. This test is performed by injecting a small amount of fluid called tuberculin into the skin in the lower part of the arm.
(xv) (a) A spray of water/lime
In a scrubber, the exhaust is passed through a spray of water or lime water.
|Column A||Column B|
|(a)||Blood clotting factor VIII||3.||Haemophilia A|
|(c)||Air spaces||2.||Gray hair|
|(d)||Bronchi||6.||An inverted Y-shaped tube|
|(a)||Heart||All others are respiratory organ.|
|(b)||Water||Others are the secretion from glands.|
|(c)||Fixed||Others joints show movements.|
|(d)||Oesophagus||Parts of respiratory tract|
|(e)||Scapula||Bones of axial skeleton|
(i) Pollens from one flower cannot germinate on the stigma of the same flower.
(ii) Albuminous and ex-albuminous seed
|Albuminous seed||Ex-albuminous seed|
|1.||Food is stored in endosperm.||Food is stored in cotyledons.|
|2.||Cotyledons are thin and membranous.||Cotyledons are thick, and fleshy.|
(iii) DDT; Plague
(iv) Waste which is generated by industries is called industrial waste. Chemicals, paint residues, oil, ash, sludge and heavy metals etc. are some types of wastes which are generated by industries.
(i) Pasteurization is a heat treatment process where the milk is heated at 60-70°C for 60 minutes and suddenly chilled and stored.
|1.||It occurs in chlorophyll containing cells in the presence of sunlight.||It occurs all the time in all living cells.|
|2.||It uses carbon dioxide and water. Glucose and oxygen are released as end product.||It uses oxygen and glucose and carbon dioxide is released as end product.|
|Direct transmission||Indirect transmission|
|1.||Close contact with the diseased person||Fomite like bedding, used utensil, towels etc.|
|2.||Droplet infection||Vector like mosquitoes|
|3.||Exposure to contaminated blood||Carrier like house flies and cockroaches|
|1.||Body is all segmented.||Body is unsegmented.|
|2.||Body has an exoskeleton made up of chitin.||They have a hard calcareous shell, made up of calcium carbonate over their soft body.|
The dot mark ◉ field are mandatory, So please fill them in carefully
To download the Sample Paper (PDF File), Please fill & submit the form below.