Biology 1011 Study guides, Class notes & Summaries

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The three principal structural components of a nucleotide are... a phosphate group, a deoxyribose sugar, and a nitrogenous base In a strand of DNA, the ______________ of one nucleotide is covalently bonded to the __________ of the next nucleotide, and the nitrogenous bases are held together by ___________ bonds. phosphate; sugar; hydrogen Are the nucleotides used in constructing the new strand of DNA previously assembled and found in the nucleus, or are they assembled at the time of ne...

Independent variableis the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable, x axis Dependant variableIt is the variable that is being tested and measured in a scientific experiment, it is being affected by the independent variable. Y axis EcologyThe study of how organisms interact with one another and with their physical environment in nature. EvolutionChanges in the genetic make-up of populations over time, sometimes res...

A scientist observes that when she opens the back door of her house to let her cat out, the songs of a certain species of bird abruptly change. She wants to follow up on her observations with an informal experiment. Which of the following is the best hypothesis for explaining the birds' song changes? - The bird species switches from song to warning call whenever it sees a potential predator.

A scientist observes that when she opens the back door of her house to let her cat out, the songs of a certain species of bird abruptly change. She wants to follow up on her observations with an informal experiment. Which of the following is the best hypothesis for explaining the birds' song changes? - The bird species switches from song to warning call whenever it sees a potential predator. A scientist wishes to test a new antibiotic's ability to treat stubborn bacterial infections. He t...