Diagram the evolution of microphylls and megaphylls. What will be an ideal response?
These processes are diagrammed in Figure 27-12 in the text.
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A trait with incomplete penetrance is one that:
A. is only expressed in homozygous recessive individuals. B. is only expressed in homozygous dominant individuals. C. is only expressed in some of the individuals that have the genotype for that trait. D. is expressed in only some offspring of affected individuals. E. can be expressed differently in different individuals that have the genotype for that trait.
The dorsal surface of a turtle's shell is the ________ while the ________ is the ventral surface
a. carapace; keratin b. keratin; plastron c. plastron; carapace d. carapace; plastron
Your friend Matti accidentally injected himself with double the correct dosage of insulin. He has collapsed. Quick! It's all up to you. What do you do?
A) Give him CPR. B) Inject him with thyroxine. C) Give him glucagon. D) Inject him with more insulin.
The American redstart (Setophagaruticilla) is in serious decline. Scientists have been able to correlate health and breeding success to levels of 13C in their blood (a chemical signature indicating the source of their diet). Birds with lower levels of 13C in their blood return to their spring breeding ground sooner, weigh more and produce more offspring. Based on this, what would you expect to find in the wintering grounds of the American redstart? Check all that apply.
A. Higher insect biomass in areas where plants have low13C B. A lack of territorial behavior being displayed by American redstarts C. Differences in food quality correlating with levels of 13C in the habitat D. Similar flora and fauna in all redstart habitats, unrelated to levels of 13C E. Limited availability of habitat in areas where plants have low13C