What type of bonds joins amino acids together

Johnny rode his bike 4 blicks down the street to his friend's house once he got to his friend house and realized he could not cone out to play he turned aroubd and went back home.what is displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Explain how organisms could be harmed by high levels of salt from roadways?

Drag the tiles to the correct boxes to complete the pairs. match the nitrogenous base of dna with its complement.