Some animals, but not humans, have an organ called a gizzard located near the top of their digestive tract. this organ is small and can contain small rocks. it also has thick, muscular walls. based on this physical description, which of the following is most likely to be the function of this organ? a. chemical digestionb. mechanical digestionc. absorption of water d. absorption of nutrients

Which is a personal reason for using tobacco

Yuan is a firefighter who provides basic first aid at accident scenes. yuan is an emergency medical

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.