The male and female flowers spring from the axils of the leaves on separate plants. The flowers of the male plant grow in panicles, 3 to 5 inches long, but are not cultivated. Only the female flowers are used for medicinal purposes. The fruit of the female plant are called strobiles and resemble small pine cones.
The atmosphere is composed of a mix of several different gases in differing amounts. The permanent gases whose percentages do not change from day to day are nitrogen, oxygen and argon. Nitrogen accounts for 78% of the atmosphere, oxygen 21% and argon 0.9%.omposition of the Atmosphere extended definition. The atmosphere contains many gases, most in small amounts, including some pollutants and greenhouse gases. The most abundant gas in the atmosphere is nitrogen, with oxygen second.
Although the composition of the atmosphere is always changing, an analysis of a snapshot of the atmosphere can provide us with a fairly good representation of the average concentrations of the permanent gases. Permanent here means the concentration is virtually constant near the earth's surface. Our snapshot reveals that nitrogen gas (N2) makes up 78% of the concentration of the dry atmosphere (by volume). Oxygen gas (O2), the second most abundant, makes up about 21% of the volume of the dry atmosphere.