<span><span>cyanobacteria
Example:
</span>Mitochrondria of the eukaryotic cells.
As
many researchers hypothesize that the old single-celled organism or the
origin of the complex-celled organisms came from the endosymbiosis of
the mitochrondrion organism and the prokaryotic cell. It has been said
that mitochondria was an independent organism which then to have been
evovled itself after planting itself inside a prokaryotic cell which
aided cellular respiration and production of ATP (Adenosine
Triphosphate). This then aided the prokaryotic cell to be more
sophisticated and caused another change from having without a true
nucleus to a eukaryotic cell with a nucleus and embedded DNA. </span>
Answer: Hydrogen reduces the number of carbon-carbon double bond.
Explanation:
Answer:
Life exit under frozen surfaces in polar seas because of the anomalous behavior of water.
Explanation:
Water behaves irregularly, which helps in preventing the total freezing of seas during winter.
Since water has its highest density at C, the surface of seas freezes while the lower regions or layers is in form of liquid. During winter, as the temperature decreases to C, the layer of water with highest density sinks to the bottom while those that are less dense floats to the top. Thus when the surface temperature is below , the lower layers under the frozen surface are at temperature range between C to C
Answer:Artificial selection is the process by which humans choose individual organisms with certain phenotypic trait values for breeding. If there is additive genetic variance for the selected trait, it will respond to the selection, that is, the trait will evolve. evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection. Evolution can an animal to make it almost unrecognisable, like cephalopods and how they evolved to make them more buoyant