Which of these statements describes an accurate model for how carbon dioxide and oxygen levels change within the ocean over time?

2points what is the term for a female reproductive cell? a. egg b. chromatid c. allele d. fertilization

Select three sports that require participants to be highly fit before the beginning a: snowboarding b: skydiving c: rock climbing d: bungee jumping e: free diving f: hiking

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his 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