Patterns+in+Nature


 * Below is the context for this topic. Please add any news that you may find that relates to this topic.**

8.3 Patterns in Nature Detailed examination of one or two species of living things does not provide an overview of the general features of living things. By looking across the range of commonly occurring living organisms, patterns in structure and function can be identified. These patterns reflect the fundamental inputs and outputs of living things – the absorption of necessary chemicals and the release of wastes. At a microscopic level, there are patterns in the structure and function of cells. The fundamental structural similarities exist because the biochemical processes are similar. Some important differences between plant and animal cells reflect the fundamental animals – the process of photosynthesis in plants. Many living things have evolved complex and efficient systems with large surface areas to facilitate the intake and removal of substances. Transport systems allow distribution and collection of nutrients and wastes.
 * Contextual Outline**

Patterns in Nature notes

Class task 8th February
 * Outcome 1 **

Using the information you have accessed for your homework, assess the impact of technology on the development of the cell theory. Pages 78-80 of your textbook may help to scaffold your answer.

Your answer should include:
 * a statement of the cell theory
 * description of at least 3 technologies that have impacted on the development of the cell theory.
 * a link between each of the technologies described and the cell theory.
 * a final statement assessing the impact of technology on the development of the cell theory.


 * __Table comparing compound light microscope and transmission electron microscope.__**

Complete organelles visible:

?mitochondria || golgi bodies, ER, ||
 * Characteristic............. || CompoundLightMicroscope.................................................................... || ElectronMicroscope................................................................... ||
 * Viewing energy source || light || electron beam ||
 * Focusing || glass lenses || magnetic lenses ||
 * Live specimen viewing || yes || no ||
 * Specimen mounting || glass slide in air || metal background in vacuum chamber ||
 * Magnification || max about 1000 times || max 300000 times ||
 * Resolving power || 0.4-0.2 um (oil) || 0.0001um ||
 * Colour transmission || yes || no ||
 * Organelles visible || nucleus, cytoplasm,vacuole, chloroplast


 * Outcome 2 **

18th February Find an animation/You Tube showing cell membrane, osmosis or diffusion.

HYPERLINK to a website showing animation of cell membrane :) [|http://www.wiley.com/legacy/college/boyer/0470003790/animations/membrane_transport/membrane_transport.htm] __[]

http://www.youtube.com/watch?v=sdiJtDRJQEc&feature=related [] cell membrane animation from Laura Clezy __

[]

20 second story of Osmosis: http://www.youtube.com/watch?v=503J9P49kBs ACTIVE TRANSPORT media type="youtube" key="vh5dhjXzbXc" height="344" width="425" PASSIVE TRANSPORT media type="youtube" key="s0p1ztrbXPY" height="344" width="425"media type="youtube" key="GW0lqf4Fqpg" height="344" width="425"

http://www.youtube.com/watch?v=6Rd2bEp380w

19th February Practice practical work-in class test.

22nd February The importance of surface area to volume ratio - why small is good.

23rd February Practical looking at SA:V at rate of diffusion.

Outcome 4

4.2 (23rd March) A **toad** can refer to a number of [|species] of [|amphibians] in the order [|Anura]. A distinction is often made between [|frogs] and toads by their appearance, prompted by the [|convergent adaptation] among so-called "toads" to dry habitats. Many "toads" have leathery skin for better water retention, and brown coloration for camouflage. Their skin also includes [|wart]-like [|parotoid glands]. Contrary to popular belief a toad's "warts" cannot transmit warts by handling or skin contact, in fact their skin's bumps or "warts" are for blending in with their environment. They also tend to walk on foot, unlike frogs which jump, and they [|burrow] in winter to hide their delicate skin.