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ICSE Guess > ICSE Papers > Question Bank > Class X > 2008 >Biology

Answers to this Paper must be written on the paper provided separately.
You will not be allowed to write during the first 15 minutes.
This time is to be spent in reading the Question Paper.
The time given at the head of this Paper is the time allowed for writing the answers.

Section I is compulsory. Attempt any four questions from Section II
The intended marks for questions or the parts of questions given in brackets [ ].

SECTION I (40 Marks)
Attempt all questions from this Section

Question 1

(a). Name the following:-[5]

1. A membrane that disappears during late prophase.
2. A fluid that occupies the larger cavity of the eyeball behind the lens.
3. The ground substance present in a chloroplast'.
4. A specific part of a chromosome that determines hereditary characteristics.
5. A neurotransmitter stored at the terminal end of the axon.

Question 1

(b). The following paragraph is related to absorption of water from the soil. Copy and complete the following paragraph by selecting the correct wordfrom those given in the box. You may use the term only once. [5]

Water enters the root hair from the soil by the process of _______ . This is because the solution in the soil is _______ whereas the cell sap in the root hair cell is _______. The water then passes through the _______ cells by cell to cell _______ and reaches the xylem of the root.

Question 1 [5]

(c) Given below are sets of 5 terms each. Without changing the first term, rearrange the remaining four, so as to be in logical sequence as per the directions given in brackets for each. One has been done for you as an example.

Example: Pathogen, active immunity, produces antibodies, lymphocytes, antigen. (defence mechanism of the body)

Answer: Pathogen - antigen - lymphocytes -produces antibodies
-active immunity.[5]

1. Destarched plant, iodine added, washed in water, a leaf boiled in alcohol, placed in sunlight. (testing for presence of starch)
2. Interphase, Anaphase, Prophase, Telophase, Metaphase (sequential stages in Karyokinesis)
3. Seminiferous tubule, penis, urethra, epididymus, vas deferens (course of passage of sperms in man)
4. Pinna, cochlea, tympanum, ear ossicles, auditory canal (route through which vibrations of sound enter the ear)
5. Soil water, xylem, cortex, endodermis, root hair (conduction of
   water)