Why does one side of the moon always face away from the earth? a. the moon's rotational period is the same as its period of revolution around the sun. b. the sun's rotational period is the same as its period of revolution around the earth. c. the moon's rotational period is the exact opposite as its period of revolution around the earth. d. the moon's rotational period is the same as its period of revolution around the earth.

Grignard reactions are highly exothermic and are performed in ether solvent. there is a real risk of fire during this reaction. in the case that a fire should occur in your distillation apparatus, what is the best course of action? g

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

How can scientists test their ideas about the origin of the universe if they can't physically interact with or study?