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Questions in biology

📝 Answered - What can humans do to help REDUCE the amount of nitrogenous waste that enters rivers and oceans? What are some ways each farm can change their farming practices to prevent pollution of the river? Will the cost outweigh the benefits of these changes for preventing excess nitrates in the rivers and oceans? Explain your answer.

📝 Answered - After glacial deposits in Alaska, lichens and fungi started colonizing the habitat. These lichens created favorable conditions for annual weeds and other shrubs. Finally, mixed evergreen trees started dominating the area. Identify the seral community in this habitat. A. lichens B. fungus C. deciduous trees D. shrubs

📝 Answered - Under which color of light will plants be least likely to make food? A. red B. blue C. orange D. green

📝 Answered - An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

📝 Answered - Explain why the oxygen consumption does not return immediately to the resting level after the exercise is finished.

📝 Answered - The 24 hour biological cycle that regulates our pattern of sleep is referred to as A. circadian rhythm. B. lunar rotational effects. C. non-REM sequencing. D. the range of consciousness.

📝 Answered - Consider the following data. | Cause of change | 2011 | 2012 | |---|---|---| | Deaths | 2 | 1 | | Births | 5 | 4 | | Immigration | 6 | 1 | | Emigration | 8 | 3 | Which would have to happen to keep the population growth of cheetahs in 2013 the same? A. 4 deaths, 7 births, 2 immigration, 6 emigration B. 3 deaths, 6 births, 5 immigration, 7 emigration C. 5 deaths, 2 births, 8 immigration, 3 emigration D. 1 deaths, 5 births, 3 immigration, 7 emigration

📝 Answered - Review various thermal death measurements by completing each sentence. 1. Adequate sterilization requires that both (Click to select) __________ and length of (Click to select) __________ be properly controlled. 2. In general, higher temperatures allow (Click to select) __________ exposure times, while lower temperatures require (Click to select) __________ exposure times. 3. In terms of these strategies, the (Click to select) __________ is defined as the shortest length of time required to kill all test microbes at a specified temperature. 4. Another optional measurement used to compare the susceptibility of microbes to heat is the (Click to selec__________) which is defined as the lowest temperature required to kill all microbes in a sample in 10 min (Click to select) __________ Possible answers: dessication exposure longer minimum inhibitory concentration pH shorter temperature thermal death point thermal death time

📝 Answered - Two samples of fish from a pond were analyzed. The second sample was taken six months after the first sample. | | Sample 1 | Sample 2 | | :----- | :------- | :------- | | Trout | 3 | 5 | | Catfish| 9 | 9 | | Bass | 8 | 6 | | All Fish | 20 | 20 | Which are valid inferences? Check all that apply. A. The second sample shows the same amount of each type of fish in the pond. B. About twice as many trout were in the pond at the time the second sample was taken. C. About the same number of bass were found in the two samples. D. Fewer bass were in the pond at the time the second sample was taken. E. About the same number of catfish were found in both samples.

📝 Answered - The structure and function of a protein is determined by the: A. amount of ATP consumed to create it. B. sequence of amino acids. C. type of RNA that it is translated from. D. strength of the hydrogen bonds in the DNA strand the gene is from.