It's the nucleus or the nucleolus to be exact which produces rRNA which as a structural component of ribosomes.
Hope i helped!
ATP is broken down into ADP to quickly provide energy. Adding a phosphate group to ADP forms ATP and energy.
After plants absorb energy from the Sun, the energy gets converted into chemical energy for the plant to carry out life activities. Chemical energy is used up by the different processes within the plant cells (e.g. cellular respiration, photosynthesis).
Please correct me if I'm wrong.. :)
