MYTUTOR SUBJECT ANSWERS

1005 views

What is the difference beween biological species concept and the phylogentic approach to defining species?

 

The biological species concept classifies species as a group of actually or potentially interbreeding individuals. This means that any two individuals (well a male and female) within the group could breed and produce fertile offspring.     This is definition  is commonly used but there are some issues with it, and situations it can't be used in.      1) Not all species sexually reproduce      2) It can't be applied to the fossil record                The phylogenetic approach is now commonly used instead of the above, especially with increased knowledge of genetics. By comparing DNA sequences it can be found which individuals have a common ancestor (an organism the whole group evolved from). This (monophyletic) group can be classed as a species. This species classification system is better as it     1) can be applied  to asexual organisms          2) Can be used for extinct species if DNA is available       3) No need to test the population to see if they can interbreed as this can be very difficult   4) However it is subjective - the scientist has to decide how recent a common ancestor to use (as all individuals have a common ancestor at some point in evolution). Usually the most recent common ancestor of a population, that can be distinguished from other populations, is used.

Harriet H. GCSE Biology tutor, A Level Biology tutor, GCSE Physical E...

2 years ago

Answered by Harriet, an A Level Biology tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

163 SUBJECT SPECIALISTS

£20 /hr

Steph F.

Degree: Neuroscience (Bachelors) - Bristol University

Subjects offered:Biology, Spanish+ 2 more

Biology
Spanish
Portuguese
Maths

“I'm Steph and I study Neuroscience at the University of Bristol at the moment. I studied Biology, Maths and Spanish at A level, achieving 3 A*s, and Physics at AS Level. I hope that with my tutorials, I can instil in you the same pass...”

MyTutor guarantee

Ozbil D. GCSE Biology tutor, A Level Biology tutor, GCSE Chemistry tu...
£22 /hr

Ozbil D.

Degree: Medicine (Bachelors) - Imperial College London University

Subjects offered:Biology, Physics+ 6 more

Biology
Physics
Maths
Chemistry
.UKCAT.
.BMAT (BioMedical Admissions)
-Personal Statements-
-Medical School Preparation-

“WHO I AM - Originally from Cyprus, I've been living in London for almost a year now, studyingMedicine at Imperial College London.I love learning, and from a very young age, had a (sometimes weird) passion for teaching. So much that I ...”

£26 /hr

Lorna P.

Degree: Veterinary Science (Bachelors) - Bristol University

Subjects offered:Biology, Maths+ 1 more

Biology
Maths
Chemistry

“Hello!  A bit about me.. I'm currently studying Veterinary Science at the University of Bristol, having previously completed a degree in Zoology at the University of Leeds. I'm a patient person and think teaching others is a very rew...”

About the author

Harriet H.

Currently unavailable: no new students

Degree: Natural Sciences (Bachelors) - Durham University

Subjects offered:Biology, Physical Education+ 1 more

Biology
Physical Education
Maths

“Hi, I'm Harriet. I am currently in my second year at university studying natural sciences (this is mainly biology but also includes maths and anthropology). I really enjoy coming up with creative ways to teach science to try and make ...”

You may also like...

Other A Level Biology questions

(Biology A-level) What are the different types of T cell and what is their function?

Why is sickle cell disease most common among people living in tropical regions, and their descendants?

What is meant by the term "degenerate" when describing DNA? Why does it occur and what are its implications for protein structure?

What is magnification of a microscope vs. the resolution?

View A Level Biology tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok