Analyze and Conclude 1. Evaluate How did the properties of the DNA you observed compare to those you
predicted in Pre-Lab Question 3?

2. Infer Why do you think that most DNA is stored in the nucleus of a cell and not
in the cytoplasm?

3. Use Analogies Sewing thread is very thin and difficult to see once a length of
thread is removed from its spool. How is the thread and spool an analogy for
what happened to the DNA in Step 7.

4. Draw Conclusions Water is the main ingredient in the detergent solution.
Ethanol is a type of alcohol. What can you conclude about the solubility of DNA
in water and alcohol?

5. Predict Do you think it would be easier or harder to extract DNA from animal
cells than from plant cells? Explain your answer?

Which way do the nitrogenous bases in dna pair up? a. a and g; t and c b. a and c; t and g c. a and t; g and c d. a and a; t and t; g and g; c and c

Warmer ocean surface water would most likely be found near

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