Astudent is working in a dna analysis laboratory and performs numerous dna isolations from eukaryotic cells. however, the student realizes at the end of the day that he forgot to label whether or not the dna samples he isolated were from nuclei or mitochondria. which of the following would not be a strategy the student could use to determine the origin of his dna isolates? a) the student could determine whether histones were present or not in each sample. b) the student could determine if the sample absorbed light of 260 nm. c) the student could compare whether the dna in each sample was circular or linear. d) the student could measure the average size of the dna isolated in each sample.

Which statement is true for bacteria a. bacteria have complex internal structures b. all bacteria are spiral in shape c. all bacteria cause disease in animals d. bacteria break down some foods

You will create a molecular clock model for an arthropod gene. follow these guidelines to make your model: . your timeline will span from 90 million years ago to the present. the common ancestor in your model is an arthropod that lived 90 million years ago. the gene that you'll track codes for a protein in the species venom . the dna sequence youll track contains 10 nitrogen bases. you can choose the order of the bases and where the mutations occur. this gene mutates at a rate of approximately 0.76 base pairs every 17.1 million years. to build your model,/ calculate the estimated time period it takes for 1 base pair to mutate. the first time period will only show the common ancestor. at the beginning of the second time period, three lineages will diverge from the common ancestor, each with a different mutation in their gene sequences. the first and third descendant species will survive for the rest of the timeline. the second descendant species was extinct 50 million years ago. calculate how long it will take for one full base pair mutation to occur. explain your reasoning by constructing a mathematical equation

One student group hypothesized that the dry baker's yeast must be alive.the temperature change, odor, and bubble foation, they said, indicated whych characteristic of life