Which is the best hypothesis for the scientific question “How does light intensity affect the rate of photosynthesis?” Light intensity, CO2 concentration, and temperature are factors that determine the rate of photosynthesis.
Light intensity has no effect on the rate of photosynthesis.
If the distance between the source of light and the plant is increased, the rate of photosynthesis will decrease.
Light intensity has an impact on the rate of photosynthesis.

Without enough light, a plant cannot photosynthesise very quickly

Explanation:

Without enough light, a plant cannot photosynthesise very quickly - even if there is plenty of water and carbon dioxide and a suitable temperature. Increasing the light intensity increases the rate of photosynthesis, until some other factor - a limiting factor - becomes in short supply.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."