100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
Lecture notes biomedical sciences/life sciences £10.49   Add to cart
Quickly navigate to
Preview
  2.  
  3. Brunel University (BU)
  4.  
  5. Biomedical Sciences

Lecture notes

Lecture notes biomedical sciences/life sciences
 35 views  0 purchase

First year and second year notes to help with exams including diagrams and annotations with colour coded to understand easily.

Preview 2 out of 7  pages

Document information

  • February 17, 2023
  • 7
  • 2022/2023
  • Lecture notes
  • Mirela martin
  • All classes

Subjects

Written for

All documents for this subject (13)

Seller

avatar-seller
sashyawijesekara

Content preview

Classification and natural selection
(Mutations)
Classification is about grouping together organisms on the basis of
features they have in common.

Taxonomy = The study of classification of life.

Nomenclature = Various names given to a specific field of study accordingly.

Classifying organisms is important because it
makes them easier to study and identify them.
Example:

Family=felidae (all cats) Kingdom = Animalia


-
¥ii¥¥¥¥¥¥
Species = Leo (lions)
Class= mammalia


*amr
-]\IfoTrEÉo



Woo
Genus =( great cats)

Order = carnivore (meat-eater)
Phylum = vertebrate animals

Domain

Kingdom
Phylum
The groups are hierchal: largest to smallest Class
Order
Family
Genus

Species

, Taxonomy
-Each organism is sorted into the highest level of taxon (domain)

-The related organisms are sorted into smaller groups starting with
kingdom and ending with species.


In 1990 3 domains were proposed by Carl Woese, this was based on 16S rRNA.
Bacteria (half of prokaryota)
Archaea (the other half of the prokaryota)
Eukarya ( Protista, fungi,plantae, animalia)

These are the 3 domains of life on Earth.

Species
- The last and most specific taxon is species
- This taxon has the smallest groups as they only contain one
type of organism.

Species are a group of organisms with similar characteristics that are
able to interbreed to give fertile offsprings.

Problematic definitions
When a horse and a donkey interbreed, they create a mule.
A horse has chromosomes, whereas a donkey has 62.

This means that the offspring (mule) will have 63 chromosomes.

When the chromosomes line up in homologous pairs in meiosis
- there won't be a pair for all of them as It’s an odd number.

This means meiosis cannot be completed.
This means no gametes are produced.

Which means the mule is infertile.

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller sashyawijesekara. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for £10.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

82191 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now

Start selling
£10.49
  • (0)
  Add to cart