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.
The pie chart shows the proportions of the main gases in the atmosphere. It is clear that the main gas is nitrogen. Oxygen - the gas that allows animals and plants to respire [respire: To engage in respiration - the energy-producing process inside living cells], and fuels to burn - is the next most abundant gas. These two gases are both elements and account for about 99% of the gases in the atmosphere. The remaining gases, such as carbon dioxide, water vapour and noble gases such as argon, are found in much smaller proportions.