The best answer to go with is b
Highland regions are considered a distinct climate because they tend to have shorter growing seasons and more daily temperature extremes. As you rise up on a mountain/highland, then the temperature will raise.
Best of luck!
<u>Answer</u>: works optimally at 20°C
Enzymes are a broad group of biological catalysts that have the role of accelerating chemical reactions by binding to molecules and altering them in specific ways. They are essential to the correct functioning of the body.
Enzymes function only at certain temperatures and pH ranges. The enzyme shown in the graph works optimally at 20°C. This is shown by the fact that the reaction rate, enhanced by the enzyme, reaches a maximum at this temperature. The higher the temperature, the more effective the enzyme.
However, at temperatures higher than this optimal threshold, the enzyme will gradually decrease in efficiency. To high or low temperatures will have this effect.
The brain is incorrect. Its the nucleus (the brain is an organ not a organelle)
hope that helps :)
