TC SIMPLIFIED BIOLOGY

Locomotion and Movement – Class 11 NCERT Detailed Explanation Introduction Living organisms exhibit a wide range of activities that help them survive, adapt, and interact with their environment. Movement is one such vital activity. It refers to any visible change in the position of any part of an organism. Locomotion, on the other hand, is the movement of the entire organism from one place to another. All locomotions are movements, but all movements are not locomotion. For example, the movement of eyelids or the contraction of heart muscles are movements, while walking, running, or swimming are locomotions Types of Movement Movements in the human body can be classified into three main types: 1. Amoeboid Movement Found in cells such as leukocytes (white blood cells). Involves cytoplasmic streaming and pseudopodia formation. Example: Movement of macrophages during infection. 2. Ciliary Movement Occurs due to coordinated beating of cilia. Found in respiratory tract and reproductive tracts...

 Plant growth promotors are substances that play a crucial role in enhancing plant development, productivity, and resilience against environmental stresses. These promotors include natural plant hormones like auxins, gibberellins, cytokinins, and ethylene, as well as synthetic compounds designed to mimic or regulate plant growth processes. Understanding and utilizing plant growth promotors can significantly impact agricultural practices, leading to improved crop yields, better stress tolerance, and more efficient use of resources. From auxin-mediated root development to gibberellin-induced stem elongation, these regulators are pivotal in shaping plant morphology and physiology. Moreover, plant growth promotors have applications in horticulture, forestry, and crop management, contributing to sustainable agriculture and enhanced food security. The interplay between plant growth promotors and environmental factors like light, water, and nutrients underscores their importance in optimi...