--%>
Assignment Help - homework help

Evolution of protochordate species

Evolutionarily protochordates can be intermediate animals between the invertebrates and vertebrates. Consider the scientist is testing hypothesis, which states that vertebrates are evolved from echinoderms. Being research objects a newly evolved protochordate species, write down example of discovery that would weaken hypothesis?

E

Expert

Verified

Hypothesis which is to be tested: Vertebrates are developed from echinoderms.

Testing material: The newly originated protochordate species (which says: a vertebrate forerunner).

Example of weakening observation (which places the new protochordate species evolutionarily very far from the echinoderms): “New species is protostome”, in comparison to the echinoderms, which are deuterostomes. This observation provides the suspicion which says that the deuterostomy in vertebrates is independent in origin from the echinoderms.

Example of strengthening observation (that nears the new protochordate species to echinoderms): “The new species has secondary radial symmetry”, which is same as that to the echinoderms. This observation makes hypothesis stronger that the echinoderms and vertebrates are also relatives.

   Related Questions in Biology

  • Q : Backlash - Barriers to Diversity -

    Negative reaction to the gaining of power and influence by members of previously underrepresented groups, leading to fear, resentment, and reverse discrimination.  

    		•
  • Q : Description of tympanum Give a brief

    Give a brief description of tympanum? In which part of ear is it situated and also writes down its function?

    		•
  • Q : Determinants of Personality -

    There are two factorson which personality determines:1. Biological Factors2. Cultural Factors

    		•
  • Q : PRINCE2 Processes PRINCE2 Processes :

    PRINCE2 Processes:A) Directing the project: conducted by senior managers/decision makers define the need for the project and the resources to be allocated B)

    Q : Germ layers-platyhelminthes How many

    How many germ layers originate body of the platyhelminthes? In relation to this feature how are these animals categorized?

    		•
  • Q : Diagonal | Crosswise Communication -

    This includes the horizontal flow of information as also that among persons at different levels who have no direct reporting relationships. This kind of communication is used to speed information flow to importing understanding. This kind of communication is used to speed information flow to impr

    		•
  • Q : Define pathogenicity of Ascaris What do

    What do you mean by the term pathogenicity of Ascaris? Briefly describe it.

    		•
  • Q : Roots of numerous swamp plant-special

    Why do roots of numerous swamp plants have special morphology?

    		•
  • Q : What are somites Explain what are

    Explain what are somites?

    		•
  • Q : Supply curve in the long run In the

    In the short run the supply curve for a firm is the short-run marginal cost curve (above the point of minimum average variable cost). Why is the supply curve in the long run not in the long-run marginal cost curve (above the point of minimum average net cost)

    		•