Question

Cacti typically grow in very dry climates with infrequent rainfall when it does rain the rain usally only penetrates a few inches into the soil which adaptation is most likey to help a cactus survive in the dry climate

Answer 1

Cacti such as the saguaro have adapted to dry climates by developing widespread root systems for water absorption, thick stems that store water, spiny structures to reduce water loss, and efficient photosynthetic processes to conserve water and energy.

Step-by-step explanation:

Adaptations to Extreme Dryness in Cacti

Cacti have developed numerous adaptations to survive in dry climates. The saguaro cactus, for example, has a widespread root system that extends far from the base, allowing it to absorb as much moisture as possible from infrequent and shallow rainfalls. Instead of leaves, which can lose water through transpiration, saguaros have a thick, fleshy stem capable of storing large amounts of water, which can comprise up to 98% of their weight. Furthermore, the stem is covered in spiny structures instead of traditional leaves, which reduces water loss and provides defense against thirsty animals. Moreover, the saguaro and other cacti have evolved variations in the light-independent reactions of photosynthesis to increase the efficiency of water usage, particularly under the harsh conditions of the desert.