You examine the fossilized remains of the winged animal. Impressions in the surrounding rock suggest that the wings may have been covered with tiny hairs, which suggests that the animal is likely to have been a mammal. When you examine the remains of the
wings, which of the following observations would be most surprising?
A) Several of the digits ("finger" bones) are extremely long, and look as if they supported a thin membrane.
B) The animal appears to have five digits in each forelimb.
C) The animal appears to have two upper arm bones.
D) The animal's wings appear to be much larger than those of any known bat.
Answer: C
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In both progeria and Werner syndrome, cells are switched from a growth to a maintenance mode, halting ____________________
Fill in the blank(s) with correct word
In birds and mammals, a vestige of the sinus venosus of the fish heart remains as the sinoatrial node, which serves as a(n)
A. pacemaker. B. inhibitory node. C. diastole detector. D. site of erythropoiesis. E. baroreceptor.
What can you conclude from these data?
Consider the pathway for the synthesis of the amino acid arginine in Neurospora:
Mutant strains of Neurospora may carry one or more mutations. Neurospora mutant strain b is grown on minimal media plus supplements as shown. Growth is shown by (+) and no growth is shown by (o).
A) Strain a has only one mutation and it is in ARG-E.
B) Strain b has only one mutation and it is in ARG-H.
C) Strain a has a mutation in ARG-F and strain b has a mutation in ARG-E.
D) Strain b has mutations in ARG-E, ARG-F, and ARG-H.
Which tool did we use in class to re-root a phylogenetic tree?
A. Consensus tree program B. PHYLIP C. Figtree