Over a million students use our free study notes to help them with their homework
The end walls are removed from each end, forming an uninterrupted tube, so water can pass through easily.Their walls are thickened with a woody substance called lignin, w...
People with cystic fibrosis have a faulty gene which means they produce excess amounts of mucus. Lots of this mucus is produced in the airways and tends to build up in the lungs. The function of mucus is ...
When the neuron is stimulated, it causes rapid depolarisation of the cell surface membrane. This will not generate an action potential unless it is large enough to exceed the threshold potential...
dilute harmful substancestransport in bloodstream and plantsfor metabolic reactions to occurseparation of substancesabsorption of ions etc.
An organism that can cause disease - e.g. virus, bacterium, fungus
←
392
393
394
395
396
→
Internet Safety
Payment Security
Cyber
Essentials
