In the last 100 years, the burning of blank by man has significantly increased the level of co2 in the atmosphere. radioactive substances fossil fuels waste

Describe the potential effects, on people, of unprotected exposure to the sun. give an example of 1 new thing have you learned about the sun’s uv rays.

When a freind is not tellig you everything you should a: bug them till they tell you b: ask them polietly to tell you c; stay silent your whole life d leave them they will tell you on there own time

Will treating a viral infection with antibiotics affect the course of the infection? a) no; antibiotics work by inhibiting enzymes specific to bacteria. antibiotics have no effect on eukaryotic or virally encoded enzymes. b) no; antibiotics do not kill viruses because viruses do not have dna or rna. c) yes; antibiotics activate the immune system, and this decreases the severity of the infection. d) yes; antibiotics can prevent viral entry into the cell by binding to host-receptor proteins.