Question

You are concerned with surveying the protozoa in the arboretum soil. While most commonly thought to live exclusively in aquatic environments, protozoa can play an important role in the nutrient cycling that takes place in soil. In addition, protozoa can help maintain the proper balance of bacterial populations within soil, as bacteria are a primary source of food for protozoa.

Protozoa are extremely diverse. However, there are three characteristics common to all organisms called protozoa. What are these three characteristics?

Choose the answer that best describes the three characteristics common to all protozoa.

eukaryotic, contain chloroplasts, produce energy via mitochondria
eukaryotic, use cilia for motility, produce energy via mitochondria
eukaryotic, unicellular, lack a cell wall
eukaryotic, reproduce sexually, contain chloroplasts

Answer 1

The correct answer is "eukaryotic, unicellular, lack a cell wall".

Step-by-step explanation:

Three characteristics that all organisms called protozoa posses is that they all are eukaryotic, unicellular and they lack of a cell wall. Actually the therm "protozoa" is an informal name given to any single-celled eukaryotic organism, which could be either a parasite or could be a free living organism. All protozoa lack a cell wall, which helps them to infect and live from other organisms in the case of the parasitic protozoa.

Answer 2

eukaryotic, unicellular, lack a cell wall

Step-by-step explanation:

The protozoa are eukaryotic, unicellular animals whose cell lack cell wall. In addition, they posses the following characteristics:

• They live as either free living or parasite in nature. As such, they feed heterotrophically.
• They are mostly motile through the use of organs like cilia. pseudopodia or flagella.
• Their size ranges from one micron to several millimeters.
• They mostly reproduce by binary fission.