Question

A cladogram is shown below.

a) Why is the amoeba considered an outgroup in this cladogram?








b) What trait does a salmon have that an earthworm does not?







c) What does this cladogram tell you about the evolutionary relationship of the traits of jaws and limbs?






d) A squirrel glider is an organism with jaws, limbs, and hair. It does not use a placenta for reproduction. Where do you think this organism would belong in the cladogram?

Answer 1

a) it is the only unicellular organism in this cladogram

b) a salmon has jaws

c) it tells that before having limbs the ancestors developed jaws as for a feature for the organism to survive easily

d) it is on the same level as the kangroo