chemistry What properties of iron account for its extensive use in terrestrial biological reactions? Speciation is an important step in studying environmental disaster. (a) Define speciation (b) What factors complicate determination of speciation?
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- which statement is false? 1)In the context of the evolution of senescence, the aphorism "live fast and die young" means that organisms with a more risky behavior will have a shorter life span. 2)Allopatric speciation is a type of speciation process that takes place in different geographic locations.(e) Using your phylogenetics knowledge from the first exam material , how was the approximate time of divergence between bees and their sister taxa estimated ?Is speciation something that happened only in the distant past, or arenew species continuing to arise today? Explain.
- Which of the following factors would not contribute toallopatric speciation?(A) The separated population is small, and genetic drift occurs.(B) The isolated population is exposed to different selectionpressures than the ancestral population.(C) Different mutations begin to distinguish the gene pools ofthe separated populations.(D) Gene flow between the two populations is extensive.Suppose the phylogenetic species concept (PSC) were preferred over other species concepts, such as the BSC. What would be the implications for (a) discourse on the evolutionary mechanisms of speciation; (b) studies of species diversity in ecological communities; (c) estimates of species diversity on a worldwide basis; and (d) conservation practices under such legal frameworks as the U.S. Endangered Species Act?Can you answer all the parts to this diagram Species 1 and 2 are sister species from which you’ve cloned related genes. On the gene tree on the top of the next page, use labels to answer the following questions: (a) Label the node that represents a gene duplication with “D,” (b) Label the nodes that represent speciation events with “S,” (c) Pick a pair of genes that are paralogs and label them both “P.” (d) Pick a pair of genes that are orthologs and label them both “O.”
- Which is more common: anagenesis or cladogenesis ?With your own terms -Define Haldane’s rule -Define allopatric speciation - Define sympatric speciation -Define parapatric speciation - How does hermaphroditism allow reproductive assurance?..A) Differentiate allopatric speciation and sympatricspeciation. Which type of speciation is more common andwhy? B) Is allopatric speciation more likely to occur inDumaran Island close to the main island of Palawan oron a more isolated island which is Culion Island of almostthe same size? Explain your prediction.
- The phylogenetic tree to the right showsthe evolutionary relationships of taxa A –H. The shapes represent character statetrait changes. A. Which traits (shapes) would individualsin taxa D have? Draw the collection oftraits. B. Is the triangle a synapomorphy orpleisomorphy (circle one)? C. Is the circle a synapomorphy orsympleisomorphy (circle one)?Scorpions occupy every continent except Antarctica, and all scorpionsfluoresce under ultraviolet light. What do these observations mostlikely suggest about the origin of scorpion fluorescence?a. The common ancestor of scorpions fluoresced.b. Scorpion fluorescence evolved independently on each continent.c. Scorpion fluorescence is a vestigial characteristic.d. Scorpion fluorescence evolved recently.Can speciation occur without complete physical separation of populations?