Multiple choice

Directions: Choose the word which is nearest in meaning to the phrase given below.

The simplest and the smallest form of plant life present in air, water and soil : essential to life but may cause diseases

  1. Virus

  2. Amoeba

  3. Bacteria

  4. Toxin

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Bacteria are microscopic, single-celled organisms found everywhere that are essential to life but can also cause disease. Viruses are not technically considered plants or complete living cells in the same way.