Trees ,Grass anything that makes it own food is a producer.
Hope this helps :))
A chemical formula<span> is a way of expressing information about the proportions of atoms that constitute a particular </span>chemical<span> compound, using a single line of </span>chemical<span> element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs.</span>
Epigenetics are variations in gene expression that does not contain
changes to the principal DNA sequence. Therefore, it is a alteration in
phenotype without a modification in genotype. With this, all traits
are considered epigenetic, the production of genetic and non-genetic effects,
begins with methylation at conception, which will then continue throughout the
life.
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,
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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
