TED2010 is on right now in California, so it’s a good opportunity to look at some of their best talks of the past year. This one is short and inspirational – how to meet the UN’s Millenium Development Goal to “Halve, by 2015, the proportion of the population without access to safe drinking water and sanitation“ – for just $8bn!
Michael Pritchard’s LifeSaver bottle is a solution to clean water needs. For just $150, it can filter even the dirtiest water, in remote areas, or following disasters such as the Haiti quakes. Spurred on by the problems following the Asian tsunami and Hurricane Katrina, see Pritchard demonstrate the technology at TED 2009:
There’s a nice little link there to cell theory and magnification, also.
This year, who is going to be worth watching? Check out the list of presenters here.
The presentation has been updated to include a lot more information on tumours – though it is not all essential for the exams, it is a good health class and an introduction to some degree-level cellular biology concepts. There are loads of links to videos and animations if you click on the shadowed images.
Essential Biology 2.5: Cell Division (mitosis)
Here’s a lovely mitosis video:
Here are some flash tutorials from the team at Hopkins Marine Station, Stanford. They make good use of the properties of the sea urchin’s gametes for studies and learning experiences:
“Gametes of sea urchins yield exceptional experiences in the classroom; teachers and students alike are riveted by being able to observe fertilization, cell division and embryonic development. The gametes are easy to use, the developmental stages are readily seen with the microscope and the rapidity of fertilization and early cell divisions allows the student to ask questions and obtain answers within the bounds of a normal classroom schedule. The utility of urchins for inquiry-based science is unrivaled.”
Head on over there to have a go at some of their labs, including a neat microscope tutorial, practice with microscope measurements, fertilisation and development and a ocean acidification investigation.
Essential Biology 2.2 Prokaryotes
MrT’s terrible pun:
If you get salmonella from a 3 day-old bacon sandwich, does that mean you’ve contracted a porkaryote?
Essential Biology 2.3 Eukaryotes
Bacterial growth populations from umich.edu
Don’t forget the great resources at Learn.Genetics.
Review quiz on Quia: Cell Theory, Prokaryotes and Eukaryotes. (for my class only)
And here’s a nice timelapse of bacterial growth:
Here’s a story of a giant bacterium, from NotExactlyRocketScience
ToK issues and ideas of academic honesty abound in the series.
What is life and where does it come from?
How do we know that living things are made of cells?
What motivated (and still motivates) the great discoveries?
How and why did Virchow plagiarise Remak’s work on cell division?
What are the ethics of new and future developments in cell biology?
*More downloads also available from RapidShare.
One of the highlights has to be the video archive of surgical operations!
Follow these links for IB topic help:
Or just visit their page for masses of links.
Again, there is a load of resources on the internet for this topic, many of which have been linked in the presentation below:
Here’s the Click4Biology page.
This is quite a long presentation covering membrane structure and function and passive transport, active transport and vesicle transport:
There are many links in the presentation – clicky clicky!
The internet is awash with decent animations and video clips for this topic – your best bet is to enter the search term “_____ transport swf” and see what comes up.