2.3 Gas Exchange in Animals
Achievement Standard 91155 (Biology 2.3) - Internal worth 3 credits.
How will you be assessed? You will have 2 periods to write a report during class time.
Is this an open-book or a closed-book assessment? Open book, however you can only bring in Checkpoints #1, #2, and #3.
What should you do to get a good grade? To get a good grade, make sure you attend all classes or watch my Videos on YouTube, complete the tasks I set in class submit on time, get feedback from me, listen to that feedback, and improve your work. Also, please remember that it is never too late to ask for help during class or lunch time tutoring sessions.
How do you get Achieved?
For each taxonomic group, describe their ecological niche by stating their habitat (land or sea), where they get their oxygen from (air or water), and what percentage of oxygen is available (20% oxygen available in air; 1% oxygen available in water).
For ALL THREE taxonomic groups, describe how TWO adaptations help with gas exchange.
How do you get Merit? (The whole class can get to this level. Super similar to Achieved, you may as well go for it!)
For TWO taxonomic groups, explain in-depth how TWO adaptations help maximise gas exchange in their niche. This involves linking WHY the adaptation is needed to survive in that niche, and HOW the adaptation helps maximise gas exchange.
How do I get Excellence? (You need to send me drafts, and listen to my feedback to be working at Excellence).
For ALL THREE taxonomic groups, you must comprehensively compare the adaptations the lung system, gill system, and tracheal system have to maximise the efficiency of gas exchange. This means you must compare how different systems achieve a large SA : V ratio, a moist respiratory surface, a thin respiratory surface, and a large concentration gradient.
For ALL THREE taxonomic groups, you must comprehensively discuss the limitations of each gas exchange system.