Question

Describe the evolutionary relationships between protists and other major eukaryote groups

Answer 1

Ans- Today's protists include groups whose ancestors were among the very last to split from organisms that gave rise to plants, animals, and fungi. Some protists change accordingly to time and Some protists move by changing their cell shape, and some move by means of specialized organelles. Other protists do not move actively but are carried by wind, water, or other organisms.

Most of protist lineages, extinct forms are rare or too scattered to be of much use in evolutionary studies. For certain taxa, fossil forms are abundant, and such material is useful in an investigation of their probable interrelationships, though only at lower taxonomic levels within those groups themselves. Speculation about the possible degrees of phylogenetic closeness between the various protists has been frustrated by the lack of appropriate fossil material. Nonetheless, the discovery of extinct protists (i.e., of the parts that were capable of becoming fossilized: cell, cyst, or spore walls; internal or external skeletons of appropriate preservable materials; and scales, loricae, tests, or shells) has thrown light on the probable interrelationships of both fossil and contemporary eukaryotes and on the paleoecology of the geologic eras and periods in which the fossil forms once lived. It has also provided valuable information on the antiquity of eukaryotes and muticellular organisms.