Astudent uses a microscope to look at cells from a tree leaf and a fingernail. which structure will the student see in the tree leaf cell that is not in the fingernail cell? a. mitochondria b. cilia c. cell wall d. ribosomes

Option C cell wall

Explanation:

Cell wall is only found in plant cell. A cell wall is to provide structural support, filtering and also protection to plant cell. Since the cell from fingernail is not a plant cell and therefore the cell wall is not available. The rest of the organelles in the options such as mitochondria, cilia, ribosomes can be found in the cells from a tree leaft and a fingernail.  

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers