social order (social orders plural) The social order in a place is the way that society is organized there. n-var. ...the threat to social order posed by right-wing extremists. social science (social sciences plural). 1 n-uncount Social science is the scientific study of society. 2 n-count The social sciences are the various types of social science, for example sociology and politics. usu pl. social scientist (social scientists plural) A social scientist is a person who studies or teaches social science.
They have to be let in through special doors called stomata. Stomata can be on both sides of the leaf, but are usually concentrated on the bottom of the leaf to limit water loss due to evaporation. If you collect leaves from many different plants, youâll notice that they donât all look the same.
Many desert plants, such as the brittlebush, reduce the temperature of their leaves by reflecting sunlight with a thick covering of hairs. Small leaves are another way of reducing water loss. One of the best examples of a small-leaved plant is the cactus, which has reduced its leaves to spikes. Some desert plants also store water. These include succulent plants, such as aloe and barrel cacti, which have stems or leaves containing spongelike cells that absorb water, and plants with underground storage, such as bulbs and rhizomes.