It is dry in deserts and hot too. There are special kinds of plants that grow in desserts means they have specialized characteristics which help them beat the dry and hot weather.
Succulent plants such as cacti, aloes, agaves have ability to store water in their leaves and stems which have thick and hard outer layer to avoid evaporation of water.
These plants have small spicules on their outer surface which protects them from animals as well.
Deserts are characterized by presence of very hot and dry climatic conditions. The plant species found in deserts have morphological and behavioral adaptations to withstand the unfavorable growth conditions. Since only a few plant species have adaptations to cope up with extremes of temperatures and water scarcity, few plants can survive in a desert.
the aleveoli are like small balloons, but not large ones. they exchange oxygen and carbon dioxide molecules (so they contain small amounts of air like a SMALL balloon, or in this situation a small pouch).
Metric system prefixes come before a basic unit of measure to indicate a multiple (or submultiple) of that unit. Basic metric units and what they measure include: meter (length) gram (mass)
