Blood picks up oxygen from the lungs from tiny sacs called (answer choices: Alveoli, Stomata, Villi, Cell Membrane) and transports it the cells where it enters the cell through the (answer choices: Alveoli, Stomata, Villi, Cell Membrane) PLEASE HELP!!!

Select all the correct answers. lactobacillus is a bacteria that live inside humans. these bacteria live on the nutrients from our bodies. they to keep our gut clean and healthy. s. typhi is a bacteria that enter our bodies through contaminated food. this bacteria causes infections in the body. based on this information, which two statements about the association between these bacteria and humans are true? a. lactobacillus shares a parasitic relationship with humans. b. s .typhi shares a parasitic relationship with humans. c. both lactobacillus and s. typhi share a parasitic relationship with humans. d. both lactobacillus and s. typhi share a mutualistic relationship with humans. e. lactobacillus shares a mutualistic relationship with humans, and s. typhi shares a parasitic relationship multiply chrse

Predict the results of a two base insertion or deletion in a strand of dna that codes for a protien, how does this differ from a three base insertion or deletion?

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?