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What are the comparison between ostracoderms and the placoderms?
They're both extinct bony fishes. The difference is that ostracoderms were jaw-less and placoderms had jaws.
What animal did the jaw evolve from?
placoderms (an ancient jawed fish)
What did Dunkloesteus eat?
They would prey on free-swimming, armored prey like arthropods, ammonites, and other placoderms.
Why did the placoderms go extinct?
Placoderms appeared in the fossil register during the Silurian period, and all placoderms (including the nightmarish Dunkleosteus terrelli) went extinct on the Late Devonian extinction.On the Carboniferous period there were already no placoderm fishes in the oceans.This Paleozoic era extinction(s) is not yet fully understood.However, the extinction of many marine life families in the Devonian/Carboniferous mass extinction, during the Frasnian/Famennian stages and specially the Kellwasser event, was due to the widespread oceanic anoxia.Few other reliable paleontologic data is known.
Where did fish come from?
Fish do not come from one source or one event. Early fish were small, jawless species that are now extinct. The first fish with jaws were Placoderms.
Simplest form of animal life?
which of these is most primitive vertebrate??? (a)hag fish (b)lampray (c)placoderms (d)shark
Meaning of peg feed?
a feed is a meal people call this a feed for short a feed is a meal people call this a feed for short a feed is a meal people call this a feed for short a feed is a meal people call this a feed for short
What is the plural of feed?
I assume you mean "feed" as in horse feed rather then the verb "to feed". The plural of "feed" is "feed, just like "moose" or "fish".
What animals lived in the same time as the phacops?
Phacops was a genus of trilobite that lived in the Devonian Period.It shared the oceans withthe placoderms (armoured fish),orthocone's,the 1st amphibians,the 1st insects (Rhyniognatha hirsti),the 1st spiders (Attercopus),and many many more animals
Is feed an adverb?
yes. i am going to feed you. but, it can be used as a noun. dont buy some goat feed.
How does the cat feed?
If you want to feed her. Do it. but it could feed herself
How does the dinoflagellate feed?
it does not feed
