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Class 10 Exam  >  Class 10 Tests  >  10-Minute Test: Chemical Coordination In Plants - Class 10 MCQ

10-Minute Test: Chemical Coordination In Plants - Class 10 MCQ


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10 Questions MCQ Test - 10-Minute Test: Chemical Coordination In Plants

10-Minute Test: Chemical Coordination In Plants for Class 10 2025 is part of Class 10 preparation. The 10-Minute Test: Chemical Coordination In Plants questions and answers have been prepared according to the Class 10 exam syllabus.The 10-Minute Test: Chemical Coordination In Plants MCQs are made for Class 10 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for 10-Minute Test: Chemical Coordination In Plants below.
Solutions of 10-Minute Test: Chemical Coordination In Plants questions in English are available as part of our course for Class 10 & 10-Minute Test: Chemical Coordination In Plants solutions in Hindi for Class 10 course. Download more important topics, notes, lectures and mock test series for Class 10 Exam by signing up for free. Attempt 10-Minute Test: Chemical Coordination In Plants | 10 questions in 10 minutes | Mock test for Class 10 preparation | Free important questions MCQ to study for Class 10 Exam | Download free PDF with solutions
10-Minute Test: Chemical Coordination In Plants - Question 1
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How do plant cells achieve shape changes necessary for movement?

Detailed Solution for 10-Minute Test: Chemical Coordination In Plants - Question 1
Plant cells achieve shape changes required for movement by adjusting their water content. This adjustment leads to swelling or shrinking of the cells, resulting in altered shapes that enable movements like leaf folding or bending towards light. Water regulation is essential for maintaining cell turgidity and supporting various plant movements.
10-Minute Test: Chemical Coordination In Plants - Question 2
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In plants, what is the main mechanism used for communication between cells to convey information about touch?

Detailed Solution for 10-Minute Test: Chemical Coordination In Plants - Question 2
Unlike animals, plants use electrical-chemical signals to communicate information between cells regarding touch or stimuli. This method of communication plays a vital role in coordinating movements in response to external stimuli, such as touch or light. These signals help plants trigger specific responses without the presence of a nervous system.
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10-Minute Test: Chemical Coordination In Plants - Question 3
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What distinguishes the movement in a sensitive plant from the movement in a seedling?

Detailed Solution for 10-Minute Test: Chemical Coordination In Plants - Question 3
The key distinction between the movement in a sensitive plant and a seedling is that the movement in the sensitive plant is not related to growth, whereas the movement in a seedling depends on its growth. This difference highlights how plants exhibit two types of movements: those tied to growth, like tropic movements, and those not linked to growth, such as immediate responses to stimuli like touch.
10-Minute Test: Chemical Coordination In Plants - Question 4
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Which plant hormone is synthesized at the shoot tip, aids in cell elongation, and is involved in phototropism?
Detailed Solution for 10-Minute Test: Chemical Coordination In Plants - Question 4
Auxin is the plant hormone that is synthesized at the shoot tip and is responsible for promoting cell elongation. It plays a vital role in phototropism, which is the plant's growth response toward light. Auxin helps regulate various aspects of plant growth and development by controlling cell division, differentiation, and elongation.
10-Minute Test: Chemical Coordination In Plants - Question 5
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What type of movement in plants is related to growth and can be either towards or away from stimuli?
Detailed Solution for 10-Minute Test: Chemical Coordination In Plants - Question 5
Tropic movements in plants are related to growth and can be either towards or away from stimuli. These movements are crucial for plant orientation and survival as they help plants respond to environmental cues such as light and gravity. For example, positive phototropism involves plants bending towards light, while negative geotropism involves growth away from the earth.
10-Minute Test: Chemical Coordination In Plants - Question 6
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What type of plant movement is characterized by an immediate response to the stimulus and involves the use of electrical-chemical means for cell-to-cell communication?
Detailed Solution for 10-Minute Test: Chemical Coordination In Plants - Question 6

Independent growth in plants is characterised by an immediate response to stimuli, using electrical-chemical means for communication between cells. Key points include:

  • The movement occurs without any growth.
  • Cells change shape by adjusting their water content, leading to swelling or shrinking.
  • An example is the rapid drooping of leaves in the Touch-me-not plant when touched.

This type of movement is distinct from growth-related movements, which are slower and involve directional growth.

10-Minute Test: Chemical Coordination In Plants - Question 7
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What is the primary function of Gibberellin in plants?
Detailed Solution for 10-Minute Test: Chemical Coordination In Plants - Question 7
Gibberellin primarily functions in plants by stimulating stem growth. This plant hormone is responsible for elongation of stems and leaves, helping the plant to grow taller. It also plays a key role in various developmental processes such as seed germination and flowering. Gibberellins are essential for regulating plant growth in response to environmental cues.
10-Minute Test: Chemical Coordination In Plants - Question 8
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What type of movement in plants involves growth responses towards or away from gravity?
Detailed Solution for 10-Minute Test: Chemical Coordination In Plants - Question 8
Geotropism, also known as gravitropism, is the plant's growth response either towards or away from the gravitational force. This movement helps plants orient themselves properly with respect to the Earth's gravitational field. For instance, roots typically exhibit positive geotropism by growing towards gravity, anchoring the plant and aiding in water and nutrient absorption, while shoots often display negative geotropism by growing away from gravity, towards the light for photosynthesis.
10-Minute Test: Chemical Coordination In Plants - Question 9
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Match the following:

Column I Column II
1. Hormones

i) Shoot
2. Seedling germination ii) growth of pollen tubes towards ovules
3. Chemotropic iii) Root
4. Positively geotropic iv) synthesized at places away from where they act
5. Positively phototropic v) growth
Detailed Solution for 10-Minute Test: Chemical Coordination In Plants - Question 9
  • Hormones are signaling molecules synthesized in one part of the plant and act elsewhere → (iv)
  • Seedling germination involves active growth → (v)
  • Chemotropism is directional growth in response to a chemical stimulus, e.g., pollen tubes growing towards ovules → (ii)
  • Positive geotropism refers to growth towards gravity, which is seen in roots → (iii)
  • Positive phototropism refers to growth towards light, typical of shoots → (i)
10-Minute Test: Chemical Coordination In Plants - Question 10
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Mark the odd one out:
Detailed Solution for 10-Minute Test: Chemical Coordination In Plants - Question 10

Auxin, cytokinin and gibberellins are growth promoting plant hormones while Abscisic acid is the growth inhibitior plant hormone.

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