The answer is light dependent
One example can be the needle shaped leaves.
In desert areas, there are not much water sources. So basically, any drop of water is precious. To help prevent water loss of plants, for example cactus has very thin leaves that are needle shaped. Or some even don't have any leaves. This can reduce the surface area of leaves and thus reduce the water evaporating to the outer environment.
Another example also shown on cactus is that they have very thick waxy cuticle. It can also prevent water from evaporating from the stem. So that's why you see the stem is very shinny.
Answer:
In terms of carbon and energy sources, all cyanobacteria are photosynthetic autotrophs.
Explanation:
Cyanobacteria are prokaryotic microorganisms, that is, they have cellular structure that corresponds to the cell of a bacterium. As for carbon absorption and energy acquisition, all cyanobacteria are autotrophic and photosynthesizing, presenting photosystems I and II but not organized in chloroplasts, such as plants. Due to the presence of these chlorophyll-rich pigments, phycocyanins and phycoerythrins, they have been called cyanophytic algae for many years.
