However, an adult elk is taller and weighs more than an adult caribou. Caribou is also the only species in the deer family where both male and female grow antlers, whereas female elk do not grow ...

we found how much the median male and female full-time, year-round (defined as working for 50-52 weeks per year, and usually working at least 35 hours per week) American worker earned in total ...

Populus tremuloides, the quaking aspen of the North American continent ... which support both male and female reproductive parts on each individual (monoecious or hermaphroditic).