Answer:
A producer. For example in a common food chain, grass->grasshopper->mouse->snake->eagle. The grasshopper eats grass which is a producer so if there aren't anymore insects like grasshoppers, then the grass grows more.
The proteins(particularly enzymes) of the membrane help chemical reactions.
An example would be enzymes involved in electron transport chain.
Answer
150 metres
Explanation
The plate moves at a rate of 3cm/year
In 5000 years, the plate would have moved:
3cm • 5000 = 15000 cm
Convert from cm to m (100cm = 1m)
15000 / 100 = 150
Answer is therefore 150 metres
