Analysis 1. Explain how the appearance of the following structures
relates to their function as part of the circulatory
system. Give as much detail as possible, including size,
texture, external structure, and internal structure.
a) right atrium
e) left ventricle
b) left atrium
f) veins
c) right ventricle g) heart valves
d) arteries, including the aorta
2. Using your own drawings and your current
understanding of the route that blood takes through
the body, trace the movement of blood from the
tissues through the heart and back to the tissues.
Start with the superior and inferior vena cavae.

The response is the basis for vaccination. primary secondary tertiary none of the above

Why are common names a problem for scientist?

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