Answer:
B. Nebula
Explanation:
A solar system, an asteroid, and a galaxy is not made of dust and gas. But a nebula is made of dust and gas
Answer:
<h2> "Archaea are older organisms than eukaryotes"
</h2>
<h2>
Explanation:</h2>
Archean are group of organisms classified under the domain Archae bacteria. They are found in environments with extreme conditions e.g.
high temperature etc.
They are prokaryotic in nature i.e. they do not possess a membrane-bound nucleus in their cells.
Based on this, archaea are not classified under the same domain as bacteria (domain- protista). They are unicellular organism, archaea are older set of organisms than eukaryotes.
The correct sequence of these events (origin of mitochondria, origin of multicellular eukaryotes, origin of chloroplasts, origin of cyanobacteria, origin of fungal-plant symbioses), from earliest to most recent, in the evolution of life on earth is 4, 3, 1, 2, 5.
The transition to eukaryotic cells seems to have taken place in the Proterozoic Era, around 1.2 to 1.5 billion years ago. Nevertheless, the latest genetic studies propose the divergence of eukaryotes from prokaryotes nearer to 2 billion years ago.
Margulis suggested the mechanism of endosymbiosis, to describe the origin of mitochondria as well as chloroplasts from persistent living prokaryotes. In accordance with this idea, a bigger prokaryote engulfed or enveloped a smaller prokaryote around 1.5 billion to 700 million years ago.
To learn more about endosymbiosis here
brainly.com/question/15829977
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First option, Echo sounding
False.... Hope it helps, Have a nice day :)
