the first protozoa appeared on earth in the early ordovician period.
the first protozoa appeared on earth in the early ordovician period.
when did the first protozoa appear on earth?
early ordovician period
bullet::::- c.750 ma – first protozoa appears: as creatures like paramecium, amoeba and melanocyrillium evolve, first animal-like cells become distinctive from plants - rise of herbivores (plant feeders) in the food chain. first sponge-like animal: similar to early colonial foraminiferan horodyskia, earliest ancestors of sponges were colonial cells that circulated food sources using flagella to their gullet to be digested. kaigas glaciation (c.750 ma): first major glaciation of earth - almost entire planet is covered with ice sheets up to more than a kilometer thick and identified from units in namibia and the south china block









































section::::proterozoic eon.:neoproterozoic era.:cryogenian period.
timeline of natural history
once inside, the prey is dissolved by digestive secretions. this generally occurs within a few hours, although some protozoa appear to be highly resistant and have been observed to live for several days inside the trap. all the time, the trap walls continue to pump out water, and the bladder can be ready for its next capture in as little as 15 to 30 minutes.









































section::::carnivory.:enhanced respiration.
utricularia