Viewing a sample of pond water under the microscope. the sample contains a variety of microorganisms, some moving faster than others. you spot a paramecium that is being followed by a didinium almost as large as itself; the paramecium initially swims away and tries to escape, but didinium, which moves in faster bursts, finally stops it and attaches firmly onto the side of the paramecium and proceeds to eat it. what type of endocytosis will ensue

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

he is very short, and he can only reach halfway up on the elevator buttons. but on a rainy day, he has his umbrella with him, and he uses it to poke the button at the top.