Answer:
sympatric speciation
Explanation:
Different sympatric species have the same closest ancestor and live in the same area but inhabiting different niches.
The steps for sympatric speciation are:
- An ancestral species inhabit a geographic area.
- With time, different populations of the same species occupy different niches or microhabitats in this general area.
- As the microhabitats are different, they have different environmental pressures that are acting on each population.
- These pressures lead to the origin of differences between groups, which need to adapt to each environment
- Each population suffers genetic changes due to environmental conditions. These changes are inheritable.
- With time, these differences drive to the final complete divergence of populations, becoming different species and reproductively isolated.
In sympatric speciation, the interruption of genetic flow must be fast, and there must be differences in niches so no species can compete and displace the other species. <em>Speciation occurs in the same distribution area of the original species</em>. The new species originate in a place with no physical barriers but different environmental pressures.
In the exposed example,
- <em>The introduced Cichlid fishes 200 years ago</em> → Original species and the common ancestor between the new derivated species
- <em>The lake</em> → general geographic area
- <em>The main lake and the streams</em> → Microhabitats or niches with different pressures each
- <em>The groups are splitting into two genetically and physically different types of fishes. They do not mate. There is no genetic flow between groups.</em> → Speciation process.
A new nucleotide can only be added to the 3' end of a growing dna strand. dna therefore always grows in the 5' to 3' direction.
Define nucleotide.
Nucleotides are organic molecules made up of a phosphate and a nucleoside. They serve as monomeric units of the essential biomolecules found in all life forms on Earth, deoxyribonucleic acid(DNA) and ribonucleic acid polymers.
Define DNA.
Deoxyribonucleic acid(DNA) is a polymer made of two polynucleotide chains that coil around one another to form a double helix and which contains the genetic material necessary for all known creatures, including many viruses, to develop, function, grow, and reproduce. Nucleic acids include DNA and ribonucleic acid.
Learn more about DNA here:-
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Dear Owner of Question
The exotic pet epidemic in the United States is overwhelming. There have been hundreds of tragic and often fatal incidents between owners and their exotic pets. Whether these animals reside in homes or in backyard menageries, the dream of owning a wild animal and raising it is short lived for many. No matter how hard a person tries to replicate a wild animal’s natural environment, they will always fall short. Owners realize fairly quickly that the animal they’ve purchased (usually through the illegal wildlife trade) isn’t manageable. Sadly, this often leads people to abandon, release, euthanize or – in the best case scenario – surrender their exotic animals to sanctuaries.
For some, releasing their pets into the wild seems the most “viable” option. Although some owners who take this course may have good intentions, releasing exotic animals into the wild is cruel, not to mention illegal. Having been raised by humans, these animals have little to no survival skills and succumb to the harsh elements that are foreign to them. They often wind up dying from exhaustion and starvation while others get hit by vehicles or killed by predators.
Sincerely, Jacob Torreyson
<span>The cell cytoskeleton is a dynamic network of fibers that can be quickly dismantled and reassembled to change cell shape and the position of cell components.</span>
