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.
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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
B. Velocity is correct because the truck movement is described with a magnitude and direction and the direction is constant.
The best example of erosion would be the deepening of a stream bed by pebbles rolling along the bottom of the stream.
<h3>What is erosion?</h3>
It is a process that leads to the removal of soil, rocks, or any other material by the action of water, wind, or ice.
Erosion is opposed to weathering which happens to be the breakdown or the dissolution of materials by agents of weathering.
Thus, breaking of shale, dissolving of rock particles, and crumbling of bedrock are all weathering processes while the deepening of a stream by pebbles rolling along the bottom of the stream exemplifies an erosion.
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Answer:
tributary
Explanation:
A tributary is a river that runs into another river.
Answer:
A
Explanation:
Genetic mutations randomly occur in the population of cells. If, by chance, there is a mutation that gives the bacterial cell resistance to an antibiotic, then that mutation will remain in the population.
This is because it gives the cell a competitive advantage (because it is more likely to survive than its non-resistant counterparts). If it survives, it will divide and pass the mutation on to its daughter cells, which will survive. This keeps happening until an entire population will carry the mutation.
