Bio Question--speciation

Discussion in 'DAT Discussions' started by Lonely Sol, Mar 5, 2007.

  1. Lonely Sol

    Lonely Sol cowgoesmoo fan!
    10+ Year Member

    Joined:
    Dec 13, 2005
    Messages:
    684
    Likes Received:
    0
    Status:
    Pre-Dental
    1. What must happen first during speciation?
    --Is it mutation?

    2. Does anyone remmember the cheetah question that everyone was talking about a while back?
     
  2. Note: SDN Members do not see this ad.

  3. BodybldgDoc

    BodybldgDoc Guest

    Joined:
    Jan 13, 2007
    Messages:
    712
    Likes Received:
    0
    Status:
    Pre-Health (Field Undecided)
    The two types of Speciation that i can remember from my ecology class are Allopatric SPeciation which is due to geographical isolation where the species diverge genotypically or phenotypically and Sympatric Speciation where species diverge while inhabiting the same place due to random mutation such as polyploidy. I'm sure there are other forms of speciation, however I cant remember them off the top of my head.

    As far as the cheetah question is concerned it goes something like this.

    the static allele frequencies, leading possibly to threat of extinction among the cheetah popluation, is closely related to a condition called . . .

    a) punctuated equilibrium
    b) catatrophism
    c) gentetic variation
    d) hybridization
    e) genetic equilibrium

    answer is E, population equilibrium remains constant in the absence of microevolution factors. the hardy-weinberg
     
  4. Lonely Sol

    Lonely Sol cowgoesmoo fan!
    10+ Year Member

    Joined:
    Dec 13, 2005
    Messages:
    684
    Likes Received:
    0
    Status:
    Pre-Dental
    Thanks alot!
    i remmember the the speciation question when i took the DAT the first time, and it asked what the first step in speciation, i dont remember the choices, but i remember putting mutation as the answer.
     
  5. fancymylotus

    fancymylotus A Whole New World
    Dentist 10+ Year Member

    Joined:
    Jul 21, 2004
    Messages:
    36,011
    Likes Received:
    17,538
    I had this question, I put mutation as the answer. PM me. I have a question para tu.
     
  6. gogiantsss

    2+ Year Member

    Joined:
    Feb 4, 2007
    Messages:
    142
    Likes Received:
    1
    Status:
    Pre-Dental
    also know that reproductive isolation is what leads to different species
     
  7. ngozi85e

    2+ Year Member

    Joined:
    Mar 4, 2007
    Messages:
    33
    Likes Received:
    0
    Status:
    Pre-Dental
    Its environmental isolation
     

Share This Page