What types of eukaryotic cells have vacuoles that act like lysosomes

How does convection affect our atmosphere? our layers of earth? our oceans?

In a good thermo flask the main cause of heat loss is

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.