Yes, but not much. They are very good at storing water. Many desert plants store water inside themselves, like cacti, for instance.
The ability to hold water for long periods of time.
yes they have leaves but small which are waxy
yes
Desert ecosystem have plants with wide spreading roots and spiny leaves.
Basically, to reduce the loss of water through their leaves. Some desert plants have a waxy coating on their leaves to do the same.
plants will allow their leaves to die if they need to reserve water during a drought. This means that there is less for the plant to have to maintain. Or, as in the desert, plants have no leaves at all.
desert plants take up carbon dioxide at night and prepare an intermediate which acted upon by the energy absorbed by the chlorophyll during the day
Plants in the desert can sustain water and do not need as much of it. Plants in wet climates require much more water than desert plants.
Yes, there are some plants in the desert with long leaves. A few examples:Palm treesYuccasSotol
The vast majority of desert plants do have leaves and few have only spines.
Desert
Most desert plants evolved according to their environment, an environment in which conservation of moisture is paramount. The broad surface of a leaf would transpire too much moisture away from the plant in the hot, dry desert, so "leaves" are an almost unseen feature of most desert plants.
Desert ecosystem have plants with wide spreading roots and spiny leaves.
Scale like leaves
Many desert plants have flat leaves so your question is invalid.
Slows down evaporation of water from the pores of the leaves.
The rainforest plants have big flat leaves so they can absorp lots of water.The desert plants don't have big flat leaves.
desert, xerophytic plants
Desert plants have evolved to store water. They have needles instead of leaves. They have spongy stems to store water. They only flower in times of good rain.
The waxy coat helps to reduce water loss from the leaves.