Which types of cells contains ribosomes?

Arrange the following structures in order of their size in ascending order:

Stomach, mitochondrion, starch grain, tracheal cell, nucleus

For each of the following, state whether it is an organelle, a cell, a tissue, an organ, an organ system, or an organism.

a heart

b trachea

c onion epidermis

d onion bulb

e onion plant

f human being

g lung

State which part of a plant cell: makes food by photosynthesis