In an experiment to determine the acceleration due to gravity, one student holds a pencil at arms length and drop it. another student starts a timer when the first student lets go and stops the timer when the pencil hits the ground. they repeat this several times and takes an average. is this a valid experiment, why or why not? a. no, it is not valid because they are only dropping one item. b. no, it is not valid because taking the average will increase rounding error. c. no, it is not valid because the short distance means there will be a lot of error due to the students reaction time. d. yes it is valid

During an investigation of an xss attack, the investigator comes across the term "[a-za-z0-9\%]+" in analyzed evidence details. what is the expression used for?

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.

Cassandra made a venn diagram to compare and contrast the two stages of cellular respiration. which belongs in the area marked x? energy is released. oxygen is used up. glucose is broken down. carbon dioxide is used up.