Science - Plants
Exam Duration: 45 Mins Total Questions : 30
Which of the following arrows show the processes that green plants go through in the day in the presence of sunlight during photosynthesis?
- (a)
P and Q only
- (b)
P and Ronly
- (c)
Q and R only
- (d)
P,Q and Ronly
Which of the following is classified correctly?
- (a)
Storage root Root not used for storage carrot grass - (b)
Storage root Root not used for storage Lotus tapoica - (c)
Storage root Root not used for storage potato turnip - (d)
Storage root Root not used for storage Maize sweet potato
Which part of the plant helps to conduct water and food to the plant?
- (a)
Root
- (b)
Stem
- (c)
Flower
- (d)
Leaf
Which part protects the flower in bud condition?
- (a)
Sepals
- (b)
Petals
- (c)
Anther
- (d)
Stigma
Which part of a plant is also called the stalk of a leaf?
- (a)
Sessile
- (b)
Plumule
- (c)
Stipule
- (d)
Petiole
Which of the following should come in the empty box given below?
- (a)
Flowers
- (b)
Stem
- (c)
Fruits
- (d)
Bark
Which of these are transported by the arrow marked 'X' in the given figure?
- (a)
Transport of food
- (b)
Transport of carbon dioxide
- (c)
Transport of water and minerals
- (d)
All the above
What is the function of the tendrils of the cucumber plant?
- (a)
It holds the plant firmly to the ground.
- (b)
It helps the plant to climb up a support.
- (c)
It stores nutrients for the plant.
- (d)
It helps the plant to carry out photosynthesis.
Which of the following represents X, Y and Z in the figure given below?
- (a)
X Y Z Anther Filament Ovule - (b)
X Y Z Style Stigma Ovary - (c)
X Y Z Style Anther Ovary - (d)
X Y Z Filament Style Ovary
Which characteristics is common to gourd, passion flower and grapevine?
- (a)
They are shrubs
- (b)
They are trees
- (c)
They are climbers
- (d)
They are herbs
Which is the characteristic feature of the lamina of a leaf?
- (a)
The main vein present on the mid rib of the leaf.
- (b)
Broad expanded green part of the leaf.
- (c)
Small leaves at the base of petioles.
- (d)
Chloroplast which contains the chlorophyll pigment.
Which of the following is the characteristic feature of parallel venation?
- (a)
Veins form a network on the leaf.
- (b)
Veins run parallel to the midrib.
- (c)
Veins run horizontal to the midrib.
- (d)
Veins crisscross each other to form an irregular pattern.
Parallel venation is observed mostly in which of the following plants?
- (a)
Monocot plants
- (b)
Dicot plants
- (c)
Thallophytes
- (d)
Bryophytes
Reticulate venation is observed mostly in which of the following plants?
- (a)
Monocot plants
- (b)
Dicot plants
- (c)
Thallophytes
- (d)
Bryophytes
In which of the following processes do plants lose water in the form of water vapour through the leaves and stem?
- (a)
Transpiration
- (b)
Respiration
- (c)
Photosynthesis
- (d)
Pollination
Which of the following is the swollen part of the pedicle?
- (a)
Petiole
- (b)
Stipule
- (c)
Sessile
- (d)
Thalamus
Which of the following are the male reproductive organs of a flower?
- (a)
Sepals
- (b)
Petals
- (c)
Stamens
- (d)
Pistil
Which of the following is the female reproductive organ in a flower?
- (a)
Sepals
- (b)
Petals
- (c)
Stamens
- (d)
Carpels
What are the parts of the pistil?
- (a)
Anther, pollen grain and pollen-sacs.
- (b)
Ovary, style and stigma.
- (c)
Pedicel, thalamus and flower bud.
- (d)
Calyx, corolla and androecium.
What is the reason behind the stigma being sticky?
- (a)
To produce more gum.
- (b)
To stick the ovules together.
- (c)
To trap pollen grains.
- (d)
There is no specific function.
Study the diagram given below
Which labelled arrow represents the movement of oxygen ?
- (a)
P
- (b)
Q
- (c)
R
- (d)
S
Which ofthe following features are useful for desert plants?
- (a)
Leaf hairs
- (b)
Large flat leaves
- (c)
Needle like leaves
- (d)
All the above
Identify 'x' in the given figure.
- (a)
Lamina
- (b)
Petiole
- (c)
Midrib
- (d)
Vein
Shefali tied a polythene bag enclosing a leafy twig on a plant.
After some time she will find
- (a)
there are water droplets inside the bag.
- (b)
there are water droplets outside the bag.
- (c)
the bag has bloated up due to more oxygen.
- (d)
the bag has deflated due to loss of carbon dioxide.
Mrs Negi took a leaf in a test-tube and added alcohol (spirit) to it. She 1 took a beaker half-filled with water and put the test-tube in it. The setup was then heated. The leaf was removed and washed in water.
After the heating of leaf in alcohol is over, the leaf becomes
- (a)
blue
- (b)
black.
- (c)
remains green.
- (d)
colourless
Mrs Negi took a leaf in a test-tube and added alcohol (spirit) to it. She 1 took a beaker half-filled with water and put the test-tube in it. The setup was then heated. The leaf was removed and washed in water.
If an iodine solution is poured on the leaf then the leaf will turn
- (a)
yellow.
- (b)
black.
- (c)
blue.
- (d)
blue-black
A potted plant was brought indoors. Some of its leaves were then covered completely with black paper and the plant shifted outdoors after two days.
What was the purpose of covering the leaves with black paper?
- (a)
Sunlight is not able to fall on the leaves.
- (b)
Leaves are not able to take up sunlight.
- (c)
Chlorophyll is not able to trap sunlight and convert it into chemical energy.
- (d)
All of these.
Which one of these is a single/simple flower?
i) Chrysanthemum
iii) Sunflower
ii) Marigold
iv) Petunia
- (a)
i) only
- (b)
i), ii) and iii) only
- (c)
ii), iii) and iv) only
- (d)
iv) only
The seeds are formed from
- (a)
pistil.
- (b)
ovary.
- (c)
stigma.
- (d)
ovules
Which of these has a modified stem to store food?
- (a)
sweet potato
- (b)
carrot
- (c)
turnip
- (d)
ginger
