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-Large surface area to volume ratio: the lungs contain millions of microscopic air sacs called alveoli, which are the sites of gas exchange in the lungs. The large number of alveoli means that the lungs h...
Unicellular organisms have a large surface area to volume that is one cell thick, therefore they have a short diffusion distance and are metabolically inactive. Therefore, they can obtain sufficient oxyge...
The organelles present in a Eukaryotic cell and there functions are the following: The Nucleus - the nucleus controls all the cells activities, it houses the DNA. Rough Endoplasmic Reticulum - The Rough E...
For DNA there are 4 types of bases: A, T, C, G.A codon is made from 3 bases, and codes for either an amino acid, or a stop.Mutation substitution means that one base is replaces by another base, eg: an...
Homeostasis is the maintenance of a constant internal environment (in response to internal or external changes in the environment)Homeostasis can be maintained by negative feedback mechanisms which detect...
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