Answer:
organelles are very similar to present-day bacteria, suggesting a common ancestor.
Explanation:
Some evidence suggests that some organelles like mitochondria and chloroplasts within eukaryotes were once used to be independent eukaryotes.
Endosymbiosis theory says that ancestral prokaryotic cells engulfed bacteria like cyanobacteria which with time evolved into mitochondria and chloroplast. Molecular evidence also proves that these organelles were once prokaryotic organisms because they show similar genetic makeup and ribosome type.
So these organelles are similar to present-day bacteria showing that they have a common ancestor.
Food
chains follow a single path as animals eat each other while ecological
Pyramids are graphical representation of the tropic structure of
ecosystem. Plants feed herbivores, herbivores feed carnivores. I
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Sand. Water has a higher specific heat due to its hydrogen bonding, while sand has low specific heat value.
