Answer your roommate has been coming back to the dorm at all hours of the night, disrupting your sleep. describe a typical night's sleep cycle and then describe how your sleep deprivation impacts your ability to learn and your health.

Stages of sleep cycle

There are five basic sleep stages in the sleep cycle.

Stage I: The alpha waves diminish while the theta waves activity increases. This is a non-REM sleep stage. During this transition stage, brain activities slow down and it becomes slower and irregular

Stage II: People drift further into sleep and breathing becomes more shallow and irregular. K-complexes occur during this stage. Less than 50% of sleep time is spent in this stage.

Stage III: In this stage there is a transition towards the next stage before. There is slow wave sleep made up of 20-50% delta waves.

Stage IV: I It occurs around midnight. People spend about 30-minute in this stage the first time

Stage V: In this stage people are into deep sleep

Improper sleep can cause issues such as insomnia, hyper tension, lack of concentration, irritation etc.  

i would go with b

cytokinesis occurs after telophase so that eliminates d

and the entire reason for cytokinesis is for cellular reproduction

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.