The base pairs for DNA replication are Thymine and Adenine, so (A and T). Cytosine and Guanine so (C and G).
DNA replication takes place in the nucleus of eukaryotic cells because prokaryotes don’t have nucleus’s.
Answer:
they need to be able to maintain their salt content, thru osmoregulation
I think it is D because your responding to the cold from stimuli and by creating heat to keep your body the average temperature it is homeostasis.
Answer:
If this is actually a question, a suit of armor would be a good analogy for the function of the skeletal system because they both protect you.
Explanation:
REM sleep (Rapid eye movement sleep) refers to a specific phase of sleep in birds and mammalsm differentiated by brisk movement of the eyes, followed with slow muscle tone all through the body.
The control over REM sleep includes pathways of REM-on and REM-off neurons in the brain. The REM-on neurons are mainly cholinergic, that is, involve acetylcholine. The REM-off neurons stimulate noradrenaline and serotonin that among other activities suppress the REM-on neurons.
It has been suggested that the REM-on neurons basically activate REM-off neurons, thus, functioning as the mechanism for the cycling between non-REM and REM sleep.
The REM-on neurons are located inside the sublateral dorsal nucleus, while the REM-off neurons are located inside the ventrolateral periaquaductal grey.