Final answer:
Plants can direct tissue growth to survive in harsh environments by using plant hormones like auxins. Energy from net primary productivity (NPP) can be allocated to reproduction, defense mechanisms, storage, and metabolic processes in plants.
Step-by-step explanation:
Plants can direct tissue growth to help them survive in harsh environments through the use of plant hormones. For example, auxins are plant hormones that allow plants to curve and bend in response to stimuli. By moving auxin to one side of the stem, plants can cause rapid cell growth on that side, causing the plant to bend towards or away from the stimulus. This helps plants optimize their growth in response to environmental conditions.
Other than growth, energy from net primary productivity (NPP) can be allocated to various other processes in plants. Some examples include:
- Reproduction: Energy is allocated to produce flowers, fruits, and seeds for reproductive purposes.
- Defense mechanisms: Energy is used to produce secondary metabolites that can protect plants from herbivores, pathogens, and other threats.
- Storage: Energy is stored in various plant structures, such as roots, tubers, and bulbs, to be used during periods of limited resources.
- Metabolic processes: Energy is allocated to various metabolic activities, such as enzyme catalysis, protein synthesis, and transport of molecules within the plant.