Over a million students use our free study notes to help them with their homework
When the potassium ions move into the guard cells they increase the concentration. This causes water to move into the guard cells from more dilute areas by osmosis. The additional water leads to the guard...
The genetic code is universal because all species use the same four bases A,T,C and G, and each base sequence codes for the same amino acid in all species. despite the 64 possible codons (sequence of thre...
Muscle contraction begins after an action potential reaches the required muscle and causes the calcium ion protein channels on the sarcoplasmic reticulum to open. This allows the calcium ions to diffuse d...
To make starch, oil, amino acids and cellulose.
Light is trapped, by the chloroplasts.
←
193
194
195
196
197
→
Internet Safety
Payment Security
Cyber
Essentials