A virus is a microscopic particle that can infect the cells of a biological organism. Viruses can only replicate themselves by infecting a host cell and therefore cannot reproduce on their own. It has been argued extensively whether viruses are living organisms.
I would answer with A. cell membrane
I know it's not B. ribosome for a fact
The bacteria can move by the means of swimming, pushing, twitching and gliding. They can also move randomly. They do not need any specific structures for their movements. Taxis, pilli, flagella and actin helps in their movement. The bacterial cell have the ability to move via taxis and can also use their pilli in order to move together. That is the reason the ETPUM on the Lycra-sealed slide is redistributed. The bacterial cells using taxis can gain energy from the polyurethane.
Vacuoles are essential in plants because the plants need a place to store water, and be able to keep their upright shape. In animals, we have muscles and bones to keep us upright, and plants have vacuoles. Hope this helps!
