Encyclopedia of Earth
Encyclopedia of Earth: Adaptations of Desert Plants
The ways in which plants have adapted through evolution in order to survive in a desert environment are described in this article. Getting water and retaining water are key to their survival, including protecting themselves from animals...
Encyclopedia of Earth
Encyclopedia of Earth: Cactus
Describes the physical features of different cacti, the variety of habitats where they can live, their distribution, evolution, taxonomy, and conservation status. (Published: January 10, 2011)
Khan Academy
Khan Academy: Selective Pressures on Cacti Needle Length
Read a passage about selective pressures on cacti needle length and answer the follow-up questions.
Curated OER
Unesco: Argentina: Ischigualasto / Talampaya Natural Parks
These two contiguous parks, extending over 275,300 ha in the desert region on the western border of the Sierra Pampeanas of central Argentina, contain the most complete continental fossil record known from the Triassic Period (245-208...