What is the role of cyclin and CDK in the cell cycle? * They perform checkpoints and regulate/control the cell cycle.
They catalyze the condensation of the chromosomes.
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They provide the energy for the actions of the spindle fibers.
They skip stages of the cell cycle.

They perform checkpoints and regulate/control the cell cycle.

Explanation:

Cyclin/CDK complexes are known to regulate both mitotic and meiotic cell cycles. Some processes are shared by both forms of cell division, however the process known as meiosis differs in terms of its features and needs. Following two rounds of cell division in succession, meiosis is characterized by the replication of DNA.

his research revealed two genetically different groups of prokaryotes, which justified splitting kingdom monera into two kingdoms. the genetic and cellular differences were so great, that these two kingdoms were eventually placed into different domains in the current three-domain system.