Which of the following statements about Plasmodium is correct? a. It causes sickle-cell anemia.
b. Because it changes its surface proteins frequently, it is largely invisible to the immune system.
c. It is transmitted by Paramecium.
d. It confers resistance to malaria.
e. It is most common in North America.

the answer is false?

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.