Question

In: Biology

7. Stebbins decided that the populations of the Ensatina complex are one species because he believed...

7. Stebbins decided that the populations of the Ensatina complex are one species because he believed that even though the more southerly populations appear to be pretty distinct, they are still connected genetically via the ring of populations connect these species. If this is the case, hypothesize events that could foster the southerly populations in becoming distinct species.

8.Create a cladogram/phylogenetic tree for the seven subspecies of Ensatina salamanders. Use the third name of the subspecies to label the separate end points.

Solutions

Expert Solution

Hypothesis: the given case is an example of cladogenesis that is splitting of one lineage into different depending upon their physiological differences and demands. The variations in the demands and survival of different places species lead to formation of a new species. Later sexual selection could be a possible reason to form entirely distinct species. This is a case of allopatric speciation as two different geographical location give rise to different species.

8. Phylogenetic tree for the seven subspecies of Ensatina salamanders:

gladiator answered 2 years ago
Next > < Previous

Related Solutions

Because ecological disruption can put native species in contact with humans and livestock, it is believed...
Because ecological disruption can put native species in contact with humans and livestock, it is believed that an increased number of threatened species in an area leads to a greater risk of novel disease transmission. A team of ecologists is investigating this relationship and records the number of threatened species and the number of novel diseases in different biogeographical regions. The following is their data set: Region. Number of Threatened Species. Number of Novel Diseases. 1 12 20 2. 10...
Because ecological disruption can put native species in contact with humans and livestock, it is believed...
Because ecological disruption can put native species in contact with humans and livestock, it is believed that an increased number of threatened species in an area leads to a greater risk of novel disease transmission. A team of ecologists is investigating this relationship and records the number of threatened species and the number of novel diseases in different biogeographical regions. The following is their data set: Region Number of threatened species Number of novel diseases 1 12 20 2 10...
Michael will sell his bike because he will move and he has decided to sell it...
Michael will sell his bike because he will move and he has decided to sell it to the first person who offers at least 200 $. Suppose that each price offer given for Michael's bike is independent and exponentially distributed RVs(random variable) with mean $ 100 each. a)   Michael sold his bike on the Kth offer. Find PMF(probability mass function) and mean of K b)   Let the amount of offer which is sold by Michael be X $. Find PDF(Probability...
Economists employ economic models * to make reality more complex. because reality is complex. because economic...
Economists employ economic models * to make reality more complex. because reality is complex. because economic theory is too easy without them. to make the field more scientific.
Peregrine falcons are one of the several species of raptors whose populations declined       dramatically in the mid-60's...
Peregrine falcons are one of the several species of raptors whose populations declined       dramatically in the mid-60's after exposure to pesticides that caused them to lay very thin-shelled eggs.  In fact, the population in eastern North America disappeared entirely, but birds have been reintroduced.  Even though use of DDT has been banned in the USA, it is still used elsewhere, and is manufactured in the USA, and so species such as peregrines are still exposed to some extent to these toxins.  At a locus...
The controller has one of the least complex job descriptions of all company managers, because there...
The controller has one of the least complex job descriptions of all company managers, because there are not many functional areas for which he or she is responsible. True False An integrated planning structure has 3 components; a strategic plan, development plan, and a long-range plan. True False The purpose of a strategic plan is to set company guidelines and policies that serve as a basis for the next level of plans, the development plan and the operations plan. True...
Pricing is one of the most complex decisions in marketing because it requires balancing multiple objectives,...
Pricing is one of the most complex decisions in marketing because it requires balancing multiple objectives, including cost/margin, positioning in the mind of the consumer, impact on channel/distribution partners, and competition. This assignment is designed to illustrate the effects of the pricing decision in these different contexts. What is the role of MSRP in your pricing decision? How might consumers respond to a brand with two SKUs, a medium-sized economy toothpaste priced at $4.00 and a large healthy product at...
The Complex forms of organisms evolved probably because...
 The Complex forms of organisms evolved probably because... A. The type and nature of Genome organization in sexually reproducing organisms.  B. Exactly replicated copy of parent genome transferred to offspring. C. Complex forms of organisms existed since beginning of the life on earth. D. None of the above
A complex ion is a species in which a central metal ion is attached to a...
A complex ion is a species in which a central metal ion is attached to a group of surrounding ions or molecules by coordinate covalent bonds. The surrounding species are called ligands. Within a ligand, the atoms that are directly attached to the metal ion (or atom) are called donor atoms. Most ligands contain a single donor atom (monodentate), but some contain two donor atoms (bidentate), six donor atoms (hexadentate), or another combination of donor atoms. A complex ion that...
Background: You are studying three populations of an endangered species of toad that used to be...
Background: You are studying three populations of an endangered species of toad that used to be common in the California central valley. Global warming has caused this species to retreat to higher elevations in recent decades where it stays cooler; the toad used to be found throughout the valley, but is now restricted to the tops of three mountains. Sampling each population reveals that the toad population on each mountaintop is limited to a few hundred individuals, whereas historical records...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT