Olympiad Science - Reproduction and Growth in Plants
Exam Duration: 45 Mins Total Questions : 30
Which of the following plants reproduce in the same way as sugarcane
i) Bryophyllum (ii) Rose (iii) Hibiscus |
- (a)
(i) and (ii) only
- (b)
(i) and (iii) only
- (c)
(ii) and (iii) only
- (d)
(i), (ii) and (iii)
The given plant sugarcane reproduces by stem, Rose and hibiscus also reproduce by stem grafting.
Which of these labelled parts form the carpel
- (a)
P and Q only
- (b)
P,Q and R only
- (c)
S and T only
- (d)
S,T and R only
In the given figure P, 0 and R forms Gynoecium or carpel
What happens after the given stage
- (a)
The ovary splits open.
- (b)
Ovary develops into a fruit and ovules into seeds.
- (c)
The ovules are dispersed
- (d)
Germination of seeds take place
The given figure shows fertilisation of male nucleus with egg cell. Fertilised egg is called zygote. Zygote develops into an embryo.
Abhi cut the potato into sections as shown below
- (a)
P and Q only
- (b)
P ,Q and R only
- (c)
S and T only
- (d)
S ,T and R only
Potato reproduces from eyes, In the given figure parts labelled 0 and S do not have any scars or eyes. Hence these sections will not produce new plants.
Which type of reproduction is shown in the diagram given below?
- (a)
Binary fission
- (b)
Fragmentation
- (c)
Sporulation
- (d)
Budding
The figure given below represents fragmentation type of reproduction in Spiroqyra.
The table given below shows the various, ways in which plants reproduce
Plants | Ways of Reproduction |
Xanthium | Z |
X | Spores |
Potato | Y |
Which of the following would you place in X,Y and Z?
- (a)
X Y Z Seeds Suckers Spore - (b)
X Y Z Maple Eyes Seeds - (c)
X Y Z Mucor Eyes Seeds - (d)
X Y Z Drumstick Spores Suckers
In the given table X - Mucor, Y - eyes and Z - seeds. Seeds, Mucor by spores and potato by eyes.
Which of the following parts of the flower shown below are the anther and stigma respectively?
- (a)
K, L
- (b)
L,M
- (c)
M,N
- (d)
N, K
In the given figure K-anther and Lstigma.
Which of the following seeds is NOT dispersed by wind?
- (a)
P
- (b)
Q
- (c)
R
- (d)
S
In the given figures P,0 are Rare pollinated by wind due to the presence of wings and hair. Whereas seed'S' consists of a hook like structure. It belongs to anthium and is dispersed by means of animals.
Which of these plants undergo vegetative reproduction?
- (a)
Tomato, lady's-finger, onion, cauliflower.
- (b)
Potato, ginger, onion, sugarcane
- (c)
Cauliflower, onion, potato, tomato
- (d)
Lady's-finger,onion, ginger, sugarcane
Potato, ginger, onion and sugar cane reproduce by vegetative reproduction.
Which of the following is not a characteristic feature of wind pollinated flower
- (a)
Flowers produce huge quantities of pollens
- (b)
Petals are brightly coloured and showy
- (c)
Pollen grains are light and non sticky
- (d)
Stamens are well exposed
Brightly coloured petals are useful for insect pollination.
The given figure illustrates a stage during reproduction in flowering plants
What is structure X?
- (a)
An ovule before pollination, but after fertilisation
- (b)
An ovule before fertilisation, but after pollination
- (c)
A pollen grain before pollination, but after fertilisation.
- (d)
A pollen grain before fertilisation, but after pollination.
In the given figure X represents the pollen grain after pollination and before fertilisation
The diagram shows the structure of a flower
Where do pollination and fertilisation take place
- (a)
Pollination-X; Fertilisation-Y
- (b)
Pollination-Y; Fertilisation-X
- (c)
Pollination-Y; Fertilisation-Z
- (d)
Pollination-Z; Fertilisation-Y
In the given figure pollination takes place at stigma represented by Y and fertilisation in ovary represented by the letter X.
The box given below shows four different fruits.
Which two fruits are dispersed By animals
- (a)
(i) and (ij)
- (b)
(j) and (iii)
- (c)
(ij) and (iv)
- (d)
(iij) and (iv)
In the given figures, figure labelled (ii) is juicy and figure labelled (iv) is with hooks. Both the fruits are dispersed by animals.
Which of the following grow into a new plant in mushroom and mucor
- (a)
Spores
- (b)
Roots
- (c)
Seeds
- (d)
Cuttings
Fungi reproduces by spores
Which of the following options define the term vegetative reproduction?
- (a)
Fertilization of stamens and stigma through pollen grains
- (b)
Development of new plant from spores when favourable conditions are provided.
- (c)
Reproduction of new plants from any part of a plant other than reproductive organs
- (d)
Reproduction of a plant from reproductive organs.
Reproduction through the vegetative parts of the plant is called vegetative reproduction.
Onions and gladiola grow from which of the following parts?
- (a)
Bulbs
- (b)
Roots
- (c)
Buds on the leaf margin
- (d)
Spores
Onion and gladiola grow from bulbs
In potatoes, new plants grow from which of the following parts of the stems?
- (a)
Bulbs of the modified stems
- (b)
Buds on the leaflets
- (c)
Modified roots
- (d)
Eyes of the modified stems
In potatoes new plants grow from eyes of the modified stems.
Which of the following takes place during fertilisation in angiosperms
- (a)
Fusion of two dissimilar flowers
- (b)
Union of stamens of unequal length
- (c)
Fusion of two dissimilar gametes
- (d)
Fusion of two similar pores
Fertilisation in angiosperms is the fusion of two dissimilar gametes.
Which ofthe following constitute a pistil
- (a)
Stigma, anther and ovary
- (b)
Stigma, stamen and ovary
- (c)
Pollen sac, style and ovule.
- (d)
Stigma, style and ovary
Stigma, style and ovary constitute pistil.
The figure given below represents which of the following processes
- (a)
Growth
- (b)
Germination
- (c)
Fertilisation
- (d)
Dispersion
The given figure represents fertilisation.
Which of the following statements is true about sticky stigma?
- (a)
To produce scents to attract birds and insects
- (b)
To hold pollen grain strongly
- (c)
There is no known function
- (d)
To attract bees
Stigma is sticky to hold pollen grain strongly.
Which organism multiplication makes the dough to rise?
- (a)
Yeast
- (b)
Mucor
- (c)
Moss
- (d)
Mould
The rapidly producing yeast cells respire anaerobically and make the dough rise
In which of the following modes of reproduction an individual produces offspring without the help of another individual?
- (a)
Sexual reproduction
- (b)
Hybridisation
- (c)
Fertilisation
- (d)
Asexual reproduction
Producing an offspring without the help of another individual is called sexual reproduction.
Moringa (drum stick) seeds are dispersed by wind due to the presence of which of the following features?
- (a)
Wings
- (b)
Pappus
- (c)
Hairy tuft
- (d)
All the above
Moringa or drumstick seeds have wings and their seeds are dispersed by means of wind
Which of the following labelled figure is/ are NOT an example of vegetative propaqation
- (a)
P only
- (b)
Q only
- (c)
Rand S only
- (d)
P ,Q and Ronly
Option B represents or exhibits sexual reproduction.
Which of the following processes is represented by the figure given below
- (a)
Fission in yeast
- (b)
Fragmentation in yeast
- (c)
Budding in yeast
- (d)
Sporeformation in yeast
The given figure shows budding, a type of reproduction in yeast
Which of the following are the characteristic feature of fruits dispersed by animals?
- (a)
Hooked and spiny
- (b)
Ory and light
- (c)
Light and powdery
- (d)
Unattractive
Fruits dispersed by animals are hooked and spiny
The landing of pollen grains on the stigma marks the end of which of the following processes
- (a)
Fertilisation
- (b)
Pollination
- (c)
Ovulation
- (d)
Germination
Landing of pollen grains on stigma is called pollination
Which of the following have fruits that have a parachute of hair called pappus
- (a)
Maple and xanthium
- (b)
Madar and sunflower
- (c)
Balsam and beans
- (d)
Mango and coconut
Madar and sunflower fruits have a parachute of hair
Where does fertilisation occur in flowers
- (a)
Stigma
- (b)
Style
- (c)
Ovary
- (d)
Pollen grain
Fertilisation occurs in ovary