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paleozoic ERA

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Q: What era did simple organisms such as stromatolites live in marine ecosystems?
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In what era had small simple marine organisms?

Precambrian Era


What ecosystems include?

An ecosystem means the surrounding in which we liv with all other living organisms...in simple context to say is tat its our surrounding or Environment.


Which statement best describes ecosystems on Earth?

Apex question test which best describes the first organisms on Earth is simple prokaryotes.


What are two living things in parts of an ecosystems?

It is as simple as this.ANIMALSPLANTS


Which evolved first - organisms with complex body structures or those with simple body structures?

Complex organisms evolved from simple organisms, so simple organisms evolved first.


What is a list of the levels of organization in the biosphere?

the levels of biological organisation from broadest to smallest are: the biosphere, biomes, ecotones,ecosystems, communities, populations, organisms, organs and organ systems, tissues, cells, organells, and molecules


Can one organism live without interacting with other organisms Why?

No for the simple reason that, on Earth, there are no ecosystems with only one single organism present. Perhaps in some hypothetical scenario an organism may survive without other organisms present, but it would be an artificially created/maintained environment.


Why is there a gap of time between the evolution of algae and trilobites?

There isn't, of course, a gap in time. There are, however, very few fossils intermediate between simple stromatolites (the first more or less multicellular organisms) and the first complex organisms found just before the Cambrian Explosion. This gap most likely exists because while predation already existed (organisms consuming other organisms), no organisms had yet developed an internal or external skeleton that could have been preserved at death. The very few organisms from that era that were preserved despite of this, were preserved in the form of molds and casts.


What is the systematic study of the biosphere's organisms called?

Don't ask for questions on your homework! You flamming piece of idiocracy


Can you give an example of a simple sentence using the word ecology?

Ecology is important in the study of living organisms.


What is the list of levels of organization in organisms organisms?

figure it out by yourself... its that simple...


How do scientist know that the first organisms were simple unicellular organisms?

Scientists data can only date back to when these simple, unicelluar organisms lived and thus believe other living organisms evolved through them.