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
Summary IB cell biology Topic 1 $3.23
Add to cart
Quickly navigate to
Preview
  2.  
  3. Undefined
  4.  
  5. IB Biology

Summary

Summary IB cell biology Topic 1

4 reviews
 3 purchases
  • Course
  • IB Biology
  • Institution
  • Undefined

A summary of the first unit of the International Baccalaureate Biology syllabus of 2016. It discusses all of the first unit, covering Introduction to cells, prokaryotic and eukaryotic cells, Membrane structure, Membrane transport, the origin of cells and cell division

Preview 2 out of 25  pages

Document information

  • No
  • Chapter 4
  • March 2, 2016
  • 25
  • 2015/2016
  • Summary

Subjects

  • ib biology
  • syllabus 2016

Written for

  • Undefined
  • international baccalaureate
  • IB Biology
All documents for this subject (5)

4  reviews

review-writer-avatar

By: linushalfar • 7 year ago

Translated by Google

A separate summary is always better. Here the topic was often missed.

review-writer-avatar

By: laurahepburn • 7 year ago

Very pleasant to the eye and has all the information needed

review-writer-avatar

By: stephansafari • 7 year ago

review-writer-avatar

By: ktmoore10 • 7 year ago

Seller

avatar-seller
StraatenLI

Reviews received

Content preview

Topic 1: Cell biology
Topic 1.1: Introduction to cells
7 Characteristics of living things:

1. Reaction to stimuli
- Movement
- Changes in the environment
2. Reproduce
- Asexual and sexual (bacteria)
- Parthenogenesis (reproduction without fertilization)
3. Respiration / gaseous exchange
- The diffusion of gases across membranes
4. Excretion
- Giving off waste products
5. Nutrition
- Autotrophic – plants
- Heterotrophic – animals
- Saprotrophic – fungi
6. Growth
- Increase in cell number and mass
- Development
7. Metabolism
- All reactions in the body
- Homeostasis – maintaining a regular metabolism

Paramecium

- Microscopic single-celled organism.
- Belongs to the Protocista Kingdom
- They live in water, animal
bodies, or moist soil. They
move using cilia; thin hair-
extensions on the body.
- Heterotrophic: food is gathered
through the mouth pore: into the
cytoplasm and forms a food
vacuole. The anal pore removes waste, and the contractile vacuole
removes excess water.
- Paramecia exhibit avoidance behavior – especially intense light, touch and
heat.
- They reproduce asexually (binary fission) or sexually (to join) and grow to
full size.

Dinoflagellates

, - Single-celled algae (fresh/salt water)
- Two flagella, which causes limited mobility.
Some species are allowed to migrate
vertically through the water column,
seeking nutrients, prey and protection from
harmful UV rays
- Half of the species can do photosynthesis,
and contain autotrophs.
- When conditions are favorable, a
population explosion or bloom may occur:
sometimes resulting in contamination of
fish, which poses a threat to human and
animal health (eutrophication).

Cell theory

The cell was first discovered by Robert Hooke in 1665.

1. All living organisms carry out the 7 basic functions of life. Evidence:
- If you were to remove or nullify one of the functions, the cell usually dies.
2. All living organisms are made up from cells. Evidence:
- Light microscope: 400 x
- Electron microscope: 70 – 100000
3. All cells arise from pre-existing cells
- No cells just appear
- Through cell division:
Mitosis: growth + repair
Meiosis: egg + sperm cells

Exceptions to the cell theory

1. Viruses: Some people consider viruses to be alive, but they are not made out
of cells. They have all 7 chracateristics, but are an exception to the cell
theory
2. Mitochondria: Breaks down glucose
3. Chloroplasts: builds up glucose
2&3 both have their own genetic material, and as they can reproduce
independently from the rest of the cells from the cell theory, is thus an
exception of the cell theory
4. Red Blood corpuscle: no nucleus

Relative sizes and scale bars (See booklet)

1 nanometer (nm) = 1/1000000000

1 micrometer (um) = 1/1000000

1 millimeter (mm) = 1/1000

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 or Stuvia-credit 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 StraatenLI. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $3.23. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

68175 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling
$3.23  3x  sold
  • (4)
Add to cart
Added