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Questions in biology

📝 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.

📝 Answered - Which of the following best characterizes a night of sleep? A. We begin the night in light sleep and end in deep sleep. B. We pass from light sleep to dream sleep to deep sleep. C. Our depth of sleep alternates up and down many times. D. We alternate from the waking state to dream sleep about six times.

📝 Answered - A group of specialized cells working together to perform a function is a(n) A. Organ system B. Organ C. Cell D. Tissue

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

📝 Answered - How many NADH are produced by glycolysis? A. 4 B. 3 C. 2 D. 5 E. 1

📝 Answered - Review the cellular targets of physical and chemical antimicrobial agents by completing each sentence. 1. An antimicrobial agent's adverse effect on cells is known as its mode of action. 2. Such antimicrobials exhibit a range of cellular targets, the (Click to select) against the widest range of microbes and the (Click to select) cellular targets and microbial types they are effective against. 3. Potential cellular targets of various physical and chemical forms of antimicrobials include the (Click to select) whose synthesis can be blocked by these agents or whose structure can be altered as well. 4. Another potential target is the (Click to select) agents resulting in a loss of (Click to select). 5. Physical and chemical agents (Click to select) activity, protein function through (Click to select) native state, and finally disrupting the synthesis or structure of (Click to select). Options: minimum inhibitory concentration, carbohydrate, cell membrane, cell wall, least, mitochondrion, mode of action, most, nucleic acids, protein, whose surface tension can be reduced by various microbicidal, synthesis through disruption of ribosome

📝 Answered - What symptoms do you think a peptic ulcer would cause? Why do you think these symptoms would occur?