Cyclins are proteins produced in cells only briefly, at specific stages of the cell cycle. These cyclins regulate the activity of kinase proteins, which help to move the cell to the next cell cycle phase. If regulation of cyclins or kinases is disrupted, the cell division process can go awry. In your Evidence Notebook, develop a model describing the interaction of cyclins and kinases, and predict what might happen if cyclins were produced constantly throughout the cell cycle

B] nitrogen fixationmight be wrong, so correct me.want extra on your answers? just go on my account and go on questions and answer, or ask in the comments!

Mitochondria is the cell organelle that produced the energy that is needed in the body system in form of atp, that is why it is called the power house of the cell. energy is needed by the living organisms to carry out the activities which sustain life.  if the mitochondria is destroyed atp will not be produced. if the mitochondria is destroyed, energy production will stop and the affected living organism will not have the energy to carry out the necessary life processes; this will lead to the death of the organism.