Measuring photosynthesis via the production of oxygen. Oxygen can be measured by counting bubbles evolved from pondweed, or by using the Audus apparatus to measure the amount of gas evolved over a period of time.
Answer:
Control group
Explanation:
A control group is<em> a group of individuals in an experiment where the independent variable being tested (the exposition to cigarette smoke in this case) can't influence the results.</em> This control group will be then compared to the experimental group (exposed to the smoke) to see the effect of the variable evaluated.
I hope you find this information usefula nd interesting! Good luck!
I’m pretty sure it’s to do with studying history and geography, I know that scientists also use it to study the earths magnetic field
Could I have a Brainly please?!
Answer:
i think it is the 3rd one
