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avoli are small chambers that branvh off from the bronchioles in the lungs, and is where gas exchange directly occurs. these have quite an ireegular shape and contain many fold in its structure, this allo...
-Antibiotics kill individual bacterial cells. Random mutation of the DNA in a bacterial cell might confer antibiotic resistance to that bacterial cell. A cell with the resistance mutation is less likely t...
Transpiration is the loss of water from a plant by evaporation, which then diffuses out of the leaf via the stomata. It is important to note whether the student understands how and why water leave...
With the world population increasing exponentially, the concept of genetic engineering can be viewed as a sustainable way to feed people. Crops can be genetically modified to improve certain characteristi...
Oxygen is absorped into the blood by the process of diffusion. A large surface area, short diffusion pathway (the distance the oxygen has to travel through) and large concentration gradient increases the ...
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