Previous Year Paper year:2012 : ICSE-X-Biology

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ICSE-X-Biology

Previous Year Paper year:2012

with Solutions - page 2

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#1-c-ii
Lymphocytes
Ans : Lymphocytes - Produce antibodies to defend the body against infection.

#1-c-iii
Seminiferous tubule
Ans : Seminiferous tubule - Produce sperms

#1-c-iv
Thylakoids
Ans : Thylakoids - Chlorophyll is located on the wall of thylakoids so light reaction of photosynthesis begins here.

#1-c-v
Beta cells of pancreas
Ans : Beta cells of pancreas - Secrete insulin that helps to lower the level of glucose in blood.

#1-d [5]
Give the exact location of the :

#1-d-i
Lenticels
Ans : Lenticels - On the older stens

#1-d-ii
Prostate gland
Ans : Prostate gland - Between the urinary bladder and the point where sperm ducts join the urethra.

#1-d-iii
Thyroid gland
Ans : Thyroid gland - In the front part in the neck

#1-d-iv
Centrosome
Ans : Centrosome - Above the nucleus in animal cells.

#1-d-v
Mitral valve
Ans : Mitral value - Between the left auricle and left ventricle.

#1-e [5]
Given below are sets office terms each. In each case rewrite the terms in logical sequence as directed at the end of each statement. An example has been done for you :
Example :
Cortical cells, Root hair, xylem, Soil water, endodermis (absorption of water by the plants)
Answer-: Soil water, Root hair, cortical cells, endodermis, xylem.

#1-e-i
Active immunity, Antigen, Antibody, Bacteria, Lymphocytes (defence mechanism of the body).
Ans : Active immunity, Bacteria, Antigen, Lymphocytes, Antibody.

#1-e-ii
Implantation, Parturition, Ovulation, Gestation, Fertilisation (stages leading to formation of foetus and birth).
Ans : Ovulation, Fertilisation, Implantation, Gestation, Parturition.

#1-e-iii
Oval window, Tympanum, Cochlea, Auditory canal, Ear ossicles (path through which a vibration of sound is transferred in the human ear).
Ans : Auditory canal, Tympanum, Ear ossicles, Oval window, Cochlea.

#1-e-iv
Karyokinesis, S-phase, Cytokinesis, G1 phase, G2-phase (cell cycle).
Ans : G1-phase, S-phase, G2-phase, Karyokinesis, Cytokinesis.