Geotropism
Geotropism is the growth movement of a plant part in response to gravity.
Practice This ConceptMain explanation
Teacher explanation
Geotropism is also called gravitropism. Roots usually show positive geotropism because they grow downward in the direction of gravity. Shoots usually show negative geotropism because they grow upward against gravity. This helps the plant survive by placing roots in the soil and shoots towards light and air.
Example
A germinating bean root growing downward into the soil shows positive geotropism.
Simple analogy
Geo means earth, so geotropism means gravity-guided growth.
Common confusion
Students often think downward growth always means the plant is weak or damaged. In fact, roots growing downward is a normal response to gravity.
Exam tip
If the stimulus is gravity, use geotropism and mention whether the part is moving toward or away from gravity.
Answer writing and exam use
1-mark use
Write the exact meaning of geotropism in one clean line.
2-mark use
Define geotropism and add one example or condition.
3-mark use
Explain geotropism, show the method or example, and mention the common mistake.
Practice this concept with focused MCQs
Open the concept quiz intro first, review the test details, and then start a focused MCQ set from this concept only. Instant score and answer review are live now.
Help improve this page
Found something confusing, incorrect, or missing?