1. Find the incorrect statement. a. During cellular respiration, carbon-containing molecules become successively more oxidized until they reach their most oxidized form, as CO2. b. The cycling of carbon through the biosphere first requires the incorporation of inorganic CO2 into organic molecules. c, Plants and algae are photosynthetic organisms that release O2 into the atmosphere. d. Only plants and algae are capable of performing photosynthesis. e. The oxidation of a molecule is always coupled to the reduction of another molecule.
Nutrient Cycle
The chemical nutrients that are essential for the synthesis of living matter are taken from the physical environment. After the death and decomposition of living organisms, they are returned to the environment to be used over and again. This cyclic back and forth regenerative movement of chemical elements between organisms and their physical environment is known as the biogeochemical cycle or nutrient cycle. Since these elements serve as the essential chemical nutrients of organisms, their cyclic movements are also called nutrient cycling or mineral cycling. Minerals are not uniformly distributed all over the ecosystems but are more concentrated in specific compartments, called pools. The major biogeochemical cycles include the water cycle, nitrogen cycle, carbon cycle, phosphorus cycle, calcium cycle, sulfur cycle, etc.
Biosphere
The geologist Eduard Sues coined the term biosphere. The biosphere is characterized as a part of the earth, which includes ground and air. Moreover, the organisms on earth live in the biosphere. The biosphere is a confined area on the earth's surface where water, soil, and air combine to promote life. Several different types of life exist here.
1. Find the incorrect statement.
a. During
b. The cycling of carbon through the biosphere first requires the incorporation of inorganic CO2 into organic molecules.
c, Plants and algae are photosynthetic organisms that release O2 into the atmosphere.
d. Only plants and algae are capable of performing photosynthesis.
e. The oxidation of a molecule is always coupled to the reduction of another molecule.
2.You are required to prepare a 0.25 M solution of glucose (f.w. 180 g/mole) in your rotation lab. Your mentor forgot to indicate how much, so you assume she wants a whole liter of it. How many grams of glucose do you need? How is the volume adjusted?
a. Place 90 g of glucose in an Erlenmeyer flask or beaker and add 1 L of tap water.
b. Place 90 g of glucose in a graduated cylinder or a volumetric flask and fill with deionized water (diH2O) until the bottom of the meniscus is on the 1-L mark.
c. Place 45 of glucose in an Erlenmeyer flask and add 1 L of tap water.
d. Place 45 g of glucose in a graduated cylinder or preferably a volumetric flask and fill with deionized water (diH2O) until the bottom of the meniscus is on the 1-L mark.
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