Various species of birds have evolved characteristics that help them survive in their own environments. The illustrations below show two different kinds of bird feet.

In what types of environments are birds with such feet likely to be found?
a. Water and wetlands
b. Pine and fir forests
c. Mountains and rocky cliffs
d. Deserts and deciduous forests

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

Which statement about dna replication is true? a. eukaryotes only have one circular chromosome that unwinds at multiple locations. b. eukaryotes can only replicate one segment of a chromosome at a time. c. prokaryotes can only replicate their single circular chromosome in the nucleus. d. prokaryotes only have one origin of replication to initiate replication.

Why do we perceive objects as retaining their brightness under different lighting levels?