Roots of a plant show which of the following?
Correct answer: D. Negative phototropism and positive geotropism
- A. Positive phototropism and negative geotropism
- B. Negative tactic movement and positive tropic movement
- C. Positive geotropism of stem and roots
- D. Negative phototropism and positive geotropism
Explanation
The roots of a plant show positive geotropism and negative phototropism because they grow towards the Earth (in response to gravity) and away from light (as they are sensitive to light but do not need it for growth) respectively.
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About Support and Movement
Support and movement covers the axial and appendicular skeleton, bone structure, joints and the arrangement of skeletal muscles. Muscle contraction is explained through actin, myosin, sliding filaments, calcium ions and ATP, while arthritis is distinguished as a disorder of joints rather than a normal part of movement.
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