<span>When a new species form by geographic isolation, it is called
geographical speciation or allopatric speciation. Geographical isolation is
a physical separation which prevents gene flow between distinct
populations. The populations on three land masses from this example, will eventually diverge from individuals of the single species that migrated to those land masses.
The members of the populations, which once belonged to the same species,
will no longer be able to mate and produce offspring. Eventually,
the formation of new species will occur, in this example three new species on three land masses from the ancestral Adansonia species.</span>
The result is that the exhaled air contains less oxygen and more carbon dioxide than the inhaled air. ... In fact, exhaled air is completely saturated with water – it contains the maximum amount of moisture, and is therefore has a relative humidity of 100%. We lose water as we breathe!
Spermatogenesis produces<span> four </span>gametes<span>, while </span>oogenesis produces one with two to three polar bodies left over. because oocytes contain not only genetic material but also mitochondria.
In a freshwater aquatic ecosystem like a pond, the organisms in the food chain include algae, small animals, insects and their larvae, small fish, big fish and a fish-eating bird or animal
