What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell?

Environmental differences within ecosystems are generally caused by

How does a lytic infection differ from a lysogenic infection?

Which of these best describes what occurs during cytokinesis? a) the chromosomes are separated b) the cell begins to divide by replicating the chromosomes c) the cytoplasm is divided between the two new daughter cells d) the nucleus opens to allow the chromosomes to enter the cytoplasm