Which of the following best describes protists? a)they are a diverse group of eukaryotes that include several unrelated lineages. b)they are a diverse group eukaryotes with a single common ancestor. c)they are a diverse group of prokaryotes that includes several unrelated lineages. d)they are diverse group of prokaryotes with a single common ancestor

One statements is an example of a scientific observation. another statement is an example of a scientific explanation. identify the correct statement for each category to illustrate how scientific explanations are inferred from scientific observations.

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

What are two ways that harvesting algae from the ocean may benefit human society? how might the harvest of algae negatively impact the ocean communities where that algae grows? how could this be prevented?