Match the following groups with the correct description a. Euglenozoans
b. Diatoms
c. Brown algae
d. Apicomplexans
e. Green algae

1. exists as a large plasmodium and sporulates when conditions dry up.
2. are key primary producers. Have silica skeletons and produce oil to maintain buoyancy.
3. no cell wall, but pellicle. Some free living, others are parasites.
4. exhibits alternation of generations and produces both motile zoospores and sperm.
5. May be unicellular or colonial. Photoautotrophic and biflagellated
6. No cell wall, but have alveoli and a complex life cycle. Some are pathogens of humans.

a- 3

b- 2

c- 4

d- 6

e- 5

Explanation:

A) Euglenozoans are eukaryotic organisms that belong to the Kingdom Protista. They are either free-living or parasitic in nature. They have no cell wall in their structure but instead possess a pellicle.

B) Diatoms are photosynthetic algae that belong to the division-Bacillariophyta. The ability to photosynthesize makes them a primary producer in an ecosystem. Their cell wall is made up of silica, which is unique to their group of algae. They also produce oils to maintain buoyancy.

C) Brown algae belong to the division- Phaeophyta. They exhibit alternation of generations in their life cycle where they produce both motile zoospores and sperm.

D) Apicomplexans are organisms such as plasmodium etc that belong to the phylum- Apicomplexa. Most of them are pathogenic, with some affecting humans. They lack cell wall but have a flat vesicle called ALVEOLI.

E) Green algae belong to the division Chlorophyta. They are photosynthetic organisms and exists as unicellular or colonial organisms. They have flagellated for locomotion.

high growth (apex)