Describe the nucleus function organelles

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

Which situation is an example of not doing work? lifting a couch throwing a baseball running up stairs carrying a box

If an organ has six haploid chromosomes,how many chromosomes are present. 6 12