1. Look closely at the taxa of the rat, rabbit, and squirrel. Based on
their classifications, which two
species are most closely related?
How do you know?
KINGDOM
Animalia
Animalia
Animalia
Type your answer here.
PHYLUM
Chordata
Chordata
Chordata
CLASS
Mammalia
Mammalia
Mammalia
ORDER
Rodentia
Lagomorpha
Rodentia
FAMILY
Muridae
Leporidae
Sciuridae
GENUS
Rattus
Oryctolagus
Sciurus
Rattus
SPECIES
Oryctolagus
Sciurus

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

Liquid water turns into water vapor at which step in the water cycle? a. precipitation o b. water run off c. evaporation d. condensation

In which layer do organisms on earth love?