Question

which organism is most likely 100 micrometers in size?
tree
bacteria
lizard
ant

Explanation:

• A tree is a large plant, usually several meters tall.
• A lizard is an animal, generally several centimeters to tens of centimeters long.
• An ant is an insect, usually a few millimeters to a few centimeters long.
• Bacteria are microscopic organisms. Many bacteria are in the range of micrometers in size. 100 micrometers ($100\ \mu m = 0.1\ mm$) is a size that is more consistent with the scale of some larger - sized bacteria (while most bacteria are smaller, but compared to the other options, bacteria are the most likely in the micrometer range).

Answer:

bacteria