Pretty sure it's basically saying to answer it for yourself and 3 other people. So for the tongue roll, on self, if you can roll your tongue say yes, for subject 1, ask another person, if they can say yes, if subject 2 (another person) can't, say no, and so on.
The right answer is A: Enzyme activity decreases at these temperatures
Temperature influences the activity of the enzymes responsible for assisting with chemical reactions in the Calvin cycle. When temperatures are low, enzyme activity is slow. As temperatures increase, the activity of the enzymes that assist in these chemical reactions also increases to a certain extent, which is the optimal response to temperature. It is at this point that the rate of photosynthesis of plants is the highest.
As the temperature continues to rise beyond this point, the enzyme activity decreases until photosynthesis stops. It is important to remember that the rate of photosynthesis in C3 plants is higher in cold conditions, whereas it is the opposite in C4 plants.
A mosquito can transmit diseases like malaria, West Nile virus, elephantiasis, dengue fever, yellow fever
<span>RNA molecules possess the same nucleobases as DNA molecules, except for one. Generally, DNA molecules contain adenine and guanine as the purine bases and cytosine and thymine as pyramidine bases. However, RNA molecules do NOT have thymine. Instead, they have uracil.</span>