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During the first month of development, how many layers of cells make up the embryo? a. 1 b. 2 c. 3 d. 4

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.

Apatient receives 250 ml mg of oil drug at noon 6 p.m. and midnight the drug has a half life of 6 hours how much does a drug remain in the patient at 6 a.m. the next day