Answer: endocrine glands release chemicals into the bloodstream
Explanation: GradPoint
D. in the nucleus
the process of making mRNA from DNA is called transcription, it occurs in the nucleus
Answer:
B. Protect us from harmful ultraviolet Radiation.
Explanation:
I did this in 6th grade. The ozone layer contains a high concentration of ozone, which absorbs most of the ultraviolet radiation reaching the earth from the sun.
Answer:
improper disposal of sewage