Q.1 Name
the cell organelle that: 1/2×2
a.
Protects cells from infections &
toxins.
b.
Synthesizes complex sugars from
glucose. OR
c.
Contains DNA (other than nucleus)
Q.2 While cooking vegetables adding of salt causes
the vegetables to release water, thus allowing vegetables to be cooked. Which
process is responsible for release of water due to addition of salt? 1
Q.3 A white flower was kept in red coloured water
overnight. By morning the flower turned red. Which process & which tissue
is responsible for the red colour of flower? 1
Q.4 An athlete increases his speed as he closes on
to the finishing line. Which muscles help him increase his running speed? 1
Q.5 Mucor
infection in lungs leads to nasal congestion, wheezing throat irritation or
coughing in healthy individuals. However, in AIDS patients it can be fatal.
Why? 1
Q.6 2 characteristic behavioural features of fungi
are: they are heterotrophic & they are non motile. What special structural
characteristics have they developed to 1/2×2
a.
Obtain food
b.
Ensure survival
Q.7 Fill in
the blanks: 1/2×6
a.
Signs of disease such as fever,
vomiting are known as its __________________
b.
Diseases that last for a short period
are known as _____________, and those that persist for long periods are known
as ________________
c.
Tuberculosis effects our lungs and is
caused due to a ___________ while common cold causes cough is caused due to
virus.
d.
Diseases caused due to microbes are
known as ______________ disease, while diseases caused due to lack of essential
nutrients in body are known as __________________ disease.
Q.8 Which
organisms are the source of antibiotics? What is their use? 1+1
Q.9 Differentiate
(2 differences) between any 3 of the following groups of organisms: 1×3
a.
Fungi & Plantae
b.
Monocotyledon & Dicotyledon
c.
Porifera & Coelentrata
d.
Pisces & Amphibia
OR
What is the most popular method of classification of living organisms? Show with the help of flow chart? Name the scientist responsible for this classification. 3
Q.10
You are asked to study cells from curd
& plant leaf. What differences would you observe in the cells from these
two sources (3 differences). Explain with the help of diagrams. 5
OR
Tabulate 2 differences between the three types of permanent
tissues. Draw diagrams to show each type.
Section B
Q.11
Onion peel cells are kept in glycerine
and treated with safranin before viewing under a microscope. Why are glycerine
& safranin used? 1
Q.12
Identify the organism & give its 2 distinctive features. 1+2
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