Question

Which protists are believed to be the relatives of animals?

• A. Dinoflagellates
• B. Slime moulds
• C. Diatoms
• D. Protozoans

Answer 1

The correct option is D

Protozoans

The correct option is D.

The explanation for the correct option:

1. Protozoans are known as primitive animals since they are thought to be the progenitors of any and all multicellular eukaryotic species.
2. They are members of the kingdom Protista.
3. They are devoid of organs and tissues.
4. They are typically unicellular in nature.

The explanation for the incorrect option:

Option A:

1. Dinoflagellates are two-flagellated unicellular protists.
2. They are usually marine plankton, however, they can also be found in freshwater.
3. Dinoflagellates exhibit traits of both animals and plants.

Option B:

1. Slime molds are saprophytic protists.
2. The organism crawls through rotting leaves and twigs, consuming organic matter.
3. Under the right environment, they create a plasmodium, which may develop and spread for many feet.

Option C:

1. Diatoms can be seen in both freshwater and saltwater.
2. Diatoms are immobile due to the lack of flagella within them.
3. They often float on the water's surface.

Final answer: Protozoans are believed to be the relatives of animals.