Statement I : Development is a term that includes all changes that an organism goes through during its life cycle from germination of the seed to senescence.

Statement II: Plants follow different pathways in response to environment or phases of life to form different kinds of structures, this ability is called plasticity.

Statement I is true. Development in biology encompasses all the processes and changes that an organism undergoes throughout its entire life cycle, from the initial stages, such as germination in plants, to growth, maturation, reproduction, and ultimately senescence or aging.

Statement II is also true. Plants do exhibit a high degree of plasticity in their growth and development. This means that they can adjust their growth patterns and structures in response to environmental factors, such as light, water availability, and nutrients, as well as developmental cues. This adaptability allows plants to form different types of structures, such as roots, stems, leaves, and flowers, based on their needs and the conditions they encounter. This phenomenon is often referred to as plasticity.