Reference no: EM132620971
Remember that cellular processes (metabolism) generate heat.
A. What can you say about the problems that mice and elephants have in maintaining a constant body temperature? What do you believe would be true of their relative metabolic rates?
B. What is one reason why elephants have large ears? Why mice have fur and naked tails? Explain your answers.
This brings us back to the title of this lab: Why are there no 20 ft tall ants?
A. Say an ant is around a 1/4 inch tall. If the species evolves isometrically so that an ant increases in height by a factor of about 1000 (i.e. 103), by what factors do its leg length and leg cross-section area increase? By what factor would its weight/volume increase?
Hint: Recall that regardless of shape, if an organism increases in size isometrically, every linear dimension will increase by the same factor. As an extension of that, any measurement of surface area or volume will continue to have the same proportion/scaling exponent relative to that length, regardless of how large or small that length is.
B. From an anatomical or morphological perspective, what difficulty is clearly going to arise?
C. Ants are ectotherms. What problems would this cause for such a large ant? What other physiological/anatomical problems do you think might arise?
D. What behavioral changes might have to go along with such an increase in size?
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