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प्रश्न
Fill in the blanks and rewrite the completed statements:
___________ acid inhibits growth leading to wilting of leaves.
उत्तर
Abscissic acid inhibits growth leading to wilting of leaves.
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संबंधित प्रश्न
Yeast reproduces by _________.
(a) spore formation
(b) multiple fission
(c) fragmentation
(d) budding
Name two simple organisms having the ability of regeneration.
Draw a labelled diagram to show that particular stage of binary fission in amoeba in which its nucleus elongates and divide into two and a constriction appears in its cell membrane.
What happens when a Planaria gets cut into two pieces?
Name the following : Thread like non-reproductive structures present in Rhizopus.
Explain the process of regeneration in Planaria.
How does Plasmodium reproduce. Is this method sexual or asexual?
Draw in sequence (showing the four stages), the process of binary fission in Amoeba.
What is the name of asexual reproduction method in Spirogyra
Name the artificial propagation mehod used for the propagation of apple trees.
Fill in the following blanks with suitable words :
Plasmodium reproduces by the process of ............ fission whereas Paramecium reproduces by the process of ......... fission.
How does an Amoeba reproduce? Describe the process of reproduction in Amoeba with the help of labelled diagrams of different stages in its reproduction process.
One of the following organisms does not reproduce by binary fission. This is :
(a) Amoeba
(b) Plasmodium
(c) Leishmania
(d) Paramecium
One of the following reproduces by forming spores. This in :
(a) Fern
(b) Planaria
(c) Spirogyra
(d) Potato
The two organisms which can regenerate fully from their cut body parts are :
(a) Paramecium and Hydra
(b) Hydra and Amoeba
(c) Planaria and Leishmania
(d) Hydra and Planaria
An alga which reproduces by the asexual reproduction method called fragmentation is :
(a) Rhizopus
(b) Salmonella
(c) Plasmodium
(d) Spirogyra
The cut part of a plant stem (without roots) which is used in grafting is called :
(a) stock
(b) stump
(c) scion
(d) graft
When the branches of a plant growing in the field are pulled towards the ground and a part of them is covered with moist soil (leaving the tips of the branches exposed above the ground), then after some time new roots develop from the parts of branches buried in the soil. On cutting these branches from the parent plant, new plants are produced from the cut parts of branches which had developed roots.
(a) What is this method of propagation of plants known as?
(b) What type of branches should a plant have to be able to be propagated by this method?
(c) Name any two plants which are grown for their flowers and propagated by this method.
(d) Name any two plants which are grown for their fruits and propagated by this method
(e) Name one plant which gets propagated by this method naturally by forming runners (soft horizontal stems running above the ground).
Write a short note on Vegetative reproduction.
Fill in the blank:
Yeast cells reproduce by ________.
Fill in the blank:
Fungi, ferns and mosses reproduce by ____________________.
Mention the common method of reproduction in Potato.
Describe the various methods of vegetative reproduction.
A blue colour flower plant denoted by BB is crossbred with that of white colour flower plant denoted by bb.
(a) State the colour of flower you would expect in their F1 generation plants.
(b) What must be the percentage of white flower plants in F2 generation if flowers of F1 plants are self-pollinated?
(c) State the expected ratio of the genotypes BB and Bb in the F2 progeny.
Name two flowering plants that reproduce both by seeds and by vegetative means.
Name the parts of the plants used to grow following flower: Gladiolus
Give the name of the plant that reproduces vegetatively by: Bulbils
How is vegetative propagation economically important?
The form of vegetative reproduction of plants where seeds are formed without fusion of gametes is called
This method of asexual reproduction is seen in paramoecium.
Name the three types of asexual reproduction in unicellular organisms.
During favourable conditions, Amoeba reproduces by ______
Many unicellular organisms reproduce by the process of ______
When one of the following is correctly matched?
Seed formation without fertilization in flowering plants involves the process of ______.
Name the asexual reproductive structure of Chlamydomonas.
The part of a seed which is a source of food during germination of seed is ______.
