Reproduction in Plants
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Asexual Reproduction: Budding, Fragmentation, and Spore Formation
SubtopicAsexual Reproduction: Budding, Fragmentation, and Spore Formation under Reproduction in Plants for Grade 7 CBSE.
Preview questions (no answers)
- 1.
What is the role of air in the reproduction of bread mold?
A.It provides oxygen only
B.It carries the spores to different places
C.It provides the moisture needed
D.It has no role
- 2.
Which method of reproduction is used by the fungus that grows on bread?
A.Budding
B.Fragmentation
C.Spore formation
D.Pollination
- 3.
Which of these organisms grows as a green, slimy mass in ponds and multiplies by breaking its body?
A.Moss
B.Fern
C.Algae
D.Yeast
- 4.
What is the primary function of the hard protective coat on a spore?
A.To help it sink in water
B.To protect it from unfavorable conditions
C.To make it look colorful
D.To provide food for the spore
- 5.
In the lifecycle of bread mould, which specific stage in the provided flowchart marks the transition from the production of reproductive units to their actual dispersal into the surrounding environment?
A.Stage 1: Growth of thread-like hyphae
B.Stage 2: Maturation of spores inside the sporangium
C.Stage 3: Bursting of the sporangium wall
D.Stage 4: Germination of spores on a new substrate
- 6.
What is the primary role of the capsule in a moss plant?
A.To absorb water
B.To produce and release spores
C.To perform photosynthesis
D.To hold the plant in the soil
- 7.
Identify the odd one out based on the method of asexual reproduction.
A.B.Yeast
C.Bread mould
D.Fern
- 8.
A laboratory culture of (bread mold) is treated with a growth inhibitor that specifically prevents the development of 'Structure B' as shown in the lifecycle diagram. The researcher notes that while the mold continues to spread across the original piece of bread, no new colonies appear on a second piece of bread located 2 meters away. Based on the diagram, what is the most scientifically accurate explanation for this result?
A.Structure 'B' is the primary organ for photosynthesis, without which the mold lacks the energy to travel.
B.The inhibition of 'Structure B' prevents the formation of 'Structure C', which are the lightweight spores required for air-borne dispersal.
C.Structure 'B' is responsible for fragmentation, and its absence stops the mold from breaking into smaller pieces.
D.The 'Process D' is a sexual reproduction stage that requires two different 'Structure B' units to meet.
- 9.
In a laboratory experiment, if the air is kept perfectly still and humid, how will the dispersal of bread mold spores be affected?
A.Dispersal will be highly efficient.
B.Dispersal will be limited as there are no air currents to carry the lightweight spores.
C.The spores will swim through the air instead.
D.The sporangium will never burst.
- 10.
If a sporangium of a fern is compared to a seed pod of a flowering plant, what is the most significant biological difference regarding their contents?
A.The sporangium contains asexual spores; the seed pod contains embryos resulting from fertilization.
B.The sporangium contains nectar; the seed pod contains spores.
C.The sporangium is larger than the seed pod.
D.The seed pod is produced asexually, while the sporangium is sexual.
Download the worksheet for Reproduction in Plants - Asexual Reproduction: Budding, Fragmentation, and Spore Formation to practice offline. It includes additional chapter-level practice questions.
Vegetative Propagation
SubtopicVegetative Propagation under Reproduction in Plants for Grade 7 CBSE.
Preview questions (no answers)
- 1.
In the process of grafting, which part of the plant provides the nutrient-absorbing system?
A.Scion
B.Stock
C.Bud
D.Fruit
- 2.
Vegetative propagation is a type of:
A.Sexual reproduction
B.Asexual reproduction
C.Both A and B
D.None of these
- 3.
Which of the following is a modified stem used in the propagation of Canna?
A.Rhizome
B.Tuber
C.Runner
D.Bulb
- 4.
Mint plants spread along the ground and produce new roots at intervals. This method is called propagation by:
A.Suckers
B.Spores
C.Seeds
D.Corms
- 5.
The method of producing new plants from a single parent without the involvement of seeds is broadly termed as:
A.Sexual reproduction
B.Vegetative propagation
C.Pollination
D.Amphimixis
- 6.
In the process of mound layering, the buried portion of the stem develops roots. What is then done with this stem?
A.It is left attached to the parent forever
B.It is cut from the parent and transplanted as a new plant
C.It is covered with more soil until it produces fruit
D.The parent plant is removed to let the new roots grow
- 7.
Banana plants, which do not produce viable seeds, are primarily propagated through:
A.Leaf cuttings
B.Rhizomes or suckers
C.Pollination by bats
D.Spore dispersal
- 8.
A gardener wants to propagate a woody plant that loses water very quickly through its leaves. He finds that 'Stem Cuttings' (Method Y) often dry out and die before they can grow roots. Instead, he uses a technique (Method X) where he bends a branch into the soil while it is still attached to the parent plant. Based on the biological principles of transport, why is Method X more successful for this plant?
A.In Method X, the branch is forced to undergo sexual reproduction to survive the burial.
B.Method X provides a continuous supply of water and nutrients from the parent plant until the new roots form.
C.Method X ensures the offspring will have greater genetic variety than those produced by Method Y.
D.In Method X, the branch enters a state of total dormancy and stops transpiration completely.
- 9.
Why is 'Vegetative Propagation' often preferred for seedless varieties of fruits like grapes and oranges?
A.Because it is the only way to propagate these plants since they do not produce viable seeds
B.Because it makes the fruit taste sweeter than if grown from seeds
C.Because it requires less sunlight than growing from seeds
D.Because it makes the plants immune to all soil diseases
- 10.
Which process describes 'Mound Layering' specifically?
A.Burying the middle portion of a flexible branch in the soil to induce root formation at the node
B.Cutting a piece of the stem and putting it in a jar of water
C.Joining a branch of one tree to the trunk of another
D.Pruning all the leaves off a plant to encourage growth
Download the worksheet for Reproduction in Plants - Vegetative Propagation to practice offline. It includes additional chapter-level practice questions.
Sexual Reproduction and Parts of a Flower
SubtopicSexual Reproduction and Parts of a Flower under Reproduction in Plants for Grade 7 CBSE.
Preview questions (no answers)
- 1.
What does the embryo inside a seed consist of?
A.A tiny root and a tiny shoot
B.Only an ovary
C.Only pollen grains
D.Petals and sepals
- 2.
Plants like Cucumber and Pumpkin have flowers that are:
A.Bisexual
B.Unisexual
C.Neither male nor female
D.Both male and female in one flower
- 3.
During fertilization, the pollen tube grows down through the ________ to reach the ovary.
A.Filament
B.Style
C.Petal
D.Sepal
- 4.
Which part of the flower is responsible for producing pollen grains?
A.Stigma
B.Anther
C.Ovary
D.Style
- 5.
Which of the following statements is FALSE about sexual reproduction in plants?
A.It involves two parents or two types of gametes
B.Seeds are produced as a result of this process
C.The offspring are identical clones of a single parent
D.Flowers are the reproductive organs involved
- 6.
What is the 'male' part of the flower called collectively?
A.Carpel
B.Pistil
C.Stamen
D.Sepal
- 7.
Which part of the flower provides the base on which all the floral whorls (sepals, petals, stamens, pistil) are arranged?
A.Pedicel
B.Thalamus
C.Style
D.Filament
- 8.
In the process of fertilization, which of the following happens first?
A.Formation of the zygote.
B.Growth of the pollen tube through the style.
C.The ovary turns into a fruit.
D.The embryo starts dividing.
- 9.
What is the function of the 'filament' in a flower?
A.To produce the female gametes.
B.To support the anther and position it for effective pollen dispersal.
C.To receive the pollen grains during pollination.
D.To develop into the seed coat.
- 10.
Coconut seeds are often dispersed by water. Which structural feature allows them to do this?
A.They have hooks to attach to aquatic animals.
B.They have a fibrous outer coat that traps air and helps them float.
C.They are very small and light like dust.
D.They have wings to glide over the water surface.
Download the worksheet for Reproduction in Plants - Sexual Reproduction and Parts of a Flower to practice offline. It includes additional chapter-level practice questions.
Pollination, Fertilisation, and Seed Dispersal
SubtopicPollination, Fertilisation, and Seed Dispersal under Reproduction in Plants for Grade 7 CBSE.
Preview questions (no answers)
- 1.
When a flower contains both stamen and pistil, it is called a/an:
A.Unisexual flower
B.Bisexual flower
C.Asexual flower
D.Sterile flower
- 2.
Which of these is a male part of the flower?
A.Stigma
B.Style
C.Ovary
D.Stamen
- 3.
What is the term for the movement of seeds away from the parent plant?
A.Pollination
B.Fertilisation
C.Seed dispersal
D.Transpiration
- 4.
If a plant produces seeds that are enclosed in fleshy, tasty fruits, they are most likely dispersed by:
A.Wind
B.Water
C.Animals
D.Gravity
- 5.
A student examines a pod and a fruit. Both are found to contain several seeds. Based on the principles of plant reproduction, what is the most likely reason for the presence of multiple seeds in these fruits?
A.Multiple pollen tubes entered and fertilised a single ovule.
B.The ovary of the original flower contained many ovules.
C.Each individual seed was formed from a separate, different flower.
D.The seeds were produced by the plant without the process of fertilisation.
- 6.
Which of these follows the correct order of events in plant reproduction?
A.Fertilisation -> Pollination -> Seed Dispersal
B.Pollination -> Fertilisation -> Seed Dispersal
C.Seed Dispersal -> Pollination -> Fertilisation
D.Fertilisation -> Seed Dispersal -> Pollination
- 7.
Which of these is a correct description of a 'pistil'?
A.The male part consisting of anther and filament
B.The female part consisting of stigma, style, and ovary
C.The protective outer green layer of a flower
D.The colorful part that attracts pollinators
- 8.
Which of the following accurately describes the relationship between the number of carpels and the structure of the fruit?
A.A flower with one carpel can never produce a fruit with multiple seeds.
B.The number of seeds is determined by the number of ovules within the carpel(s).
C.Each carpel always develops into a separate fruit.
D.Multiple carpels always fuse to form a single seed.
- 9.
If you find a fruit with a very thick, stony endocarp (like a peach or mango) and a fleshy mesocarp, what is the most likely method of its seed dispersal?
A.The fruit is carried by water currents.
B.The fruit is eaten by animals, and the stony seed is discarded or passed in droppings.
C.The fruit bursts open when ripe, throwing the stony seed out.
D.The fruit is light enough to be carried by the wind.
- 10.
Why do seeds dispersed by wind, like those of the Drumstick tree, often have 'wings'?
A.To help them glide and travel longer distances from the parent.
B.To protect the embryo from predators while in flight.
C.To help the seed float in case it lands in water.
D.To increase the speed at which the seed falls to the ground.
Download the worksheet for Reproduction in Plants - Pollination, Fertilisation, and Seed Dispersal to practice offline. It includes additional chapter-level practice questions.