Euglenophyta is a group of unicellular, eukaryotic organisms. They are small, free-living forms, or parasites that present different feeding mechanisms and behaviors, such as heterotrophy, autotrophy, or mixotrophy.

Dinoflagellates are unicellular, flagellated, free-living protists that might form colonies. Most of them are autotrophic organisms but some of them are heterotrophic, or mixotrophic. In these last cases, dinoflagellates can feed on other dinoflagellates, protozoans, or diatoms. They can also be parasites.

Entamoebas are endoparasitic organisms with no mitochondria as an adaptation of living in environments with low oxygen concentration.

Apicomplexa is a unicellular, protist group. They have medical and economic importance as they are animals and human parasites. They have an apical complex that helps them to fixate to the host cell and release a substance that provokes an invagination in the host membrane. This invagination allows the parasite to get into the host cell.

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3 years ago

Lancelets display how many of the four major characteristics of the phylum chordata? 1 2 3 4 next

aleksandrvk [35]

The lancelets consist of approximately 32 types of fish-like maritime chordates in the order of Amphioxiformes, with an international dissemination in tropical seas and low temperate, they are commonly found half-buried in sand. The lancelets show 4 of the major characteristics of the phylum chordata.

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3 years ago