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Question
The diagram given alongside shows a type of tropism. Study the same and answer the questions that follow:
- Name and define the type of tropism shown in the diagram.
- Label the guidelines (1) to (4).
- Name two effective stimulants that help in the growth of part (2).
- Name two groups of plants where part (2) grows towards gametophyte with the help of the stimulants mentioned in (c).
Solution
- Chemotropism: Chemotropism is the phenomenon of the growth of plant organs in response to chemicals.
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- Pollen grain
- Pollen tube
- Ovule
- Ovary
- Sugars and peptones.
- Gymnosperms and angiosperms.
RELATED QUESTIONS
Give the scientific terms used to represent the Bending of roots towards water.
Name the plant organ which is positively geotropic
Name one plant part which exhibits positive thigmotropism.
The bending of the root of a plant away from a source of light is caused by a plant hormone called :
(a) cytokinin
(b) gibberellin
(c) abscisic acid
(d) auxin
Which of the following plant part exhibits negative phototropism?
(a) root
(b) branch
(c) leaves
(d) stem
The root of the plant is ______.
- positively phototropic but negatively geotropic
- positively geotropic but negatively phototropic
- negatively phototropic but positively hydrotropic
- negatively hydrotropic but positively phototropic
Any change in the environment to which an organism responds is called ____________.
The growth of pollen tubes towards ovules is due to
Give one example of geotropism.
Arrange and rewrite the terms in the group in the correct order so as to be in a logical sequence, beginning with the term that is underlined.
Apical meristem, Positive phototropism, Auxins, Cell elongation.
