Biology, 30.06.2019 04:50, taterbugwallen7944
Abiology teacher takes fish, algae, pond weed, invertebrates, and bottom muck from a local pond and establishes them in an aquarium. when the system is stable, the teacher seals it into a large, airtight glass box and leaves the box in a sunny location. after three months, the organisms in the aquarium appear alive and healthy. which of the following statements about the experiment is true? a. no energy has entered or left the glass box during the three months. b. during the three months, the biomass of animal life was greater than the biomass of plant life. c. some of the energy in the system has moved from one organism to another during the three months. d. the air in the glass box contains no carbon dioxide. e. some oxygen from water molecules has become part of organic molecules.
Answers: 1
Biology, 22.06.2019 07:00, thomasalmo2014
Which best describes the scientific method? a. a path of clearly defined steps that must be followed in a particular order b. a possible answer to a scientific question based on knowledge or research c. the recipe for how to conduct an experiment that must be followed precisely d. the process of hypothesis and testing through which scientific inquiry occurs
Answers: 1
Biology, 22.06.2019 09:30, ssuereichard
You have just sequenced a new protein found in mice and observe that sulfur-containing cysteine residues occur at regular intervals. what is the significance of this finding? it will be important to include cysteine in the diet of the mice. cysteine residues are required for the formation of α helices and β pleated sheets. cysteine residues are involved in disulfide bridges that form tertiary structure. cysteine causes bends, or angles, to occur in the tertiary structure of proteins.
Answers: 1
Abiology teacher takes fish, algae, pond weed, invertebrates, and bottom muck from a local pond and...
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