Cuz it allows you to answer questions and also supplies you with a foundation on which to base your questions
A student set up an experiment to show the effect of light color on photosynthesis in Elodea plants. She filled two test tubes with distilled water and placed a piece of Elodea in each of the tubes. She added a drop of phenol red, which turns red in a basic solution and yellow in an acidic solution. She blew in each tube before placing the volumeters on the top of the tube to add carbon di oxide.
She blew in the test tubes to add the carbon di oxide to the tube which caused the distilled water to become more acidic so the phenol red turned yellow, and when she exposes the tubes to different set of color lights. So, in the presence of light it turn the water into red color, which shows the process of photosynthesis depending on the wavelength of different color.
Learn more about Photosynthesis here,
brainly.com/question/1757345
#SPJ4
Your question is incomplete, but most probably your full question was…
A student set up an experiment to show the effect of light color on photosynthesis in Elodea plants. She filled two test tubes with distilled water and placed a piece of Elodea in each of the tubes. She added a drop of phenol red, which turns red in a basic solution and yellow in an acidic solution. She blew in each tube before placing the volumeters on the top of the tube. Why did she blow into the tube? Multiple Choice
1) to add oxygen to the tube
2) to add carbon dioxide to the tube
3) to add carbohydrates to the tube
4) to add sodium bicarbonate to the tube
D. Heterotrophs
EXPLANATION: Heterotrophs cannot produce its own food so it kills and eats other organisms for energy. Plants are autotrophs which means they can make their own foods.
Personally I don't hear any but lots of my friends say they do. I obviously just hear silence but if you hear a ringing when there not plugged then I'd visit a doctor :D
