Most species of cacti have lost true leaves, retaining only spines, which are highly modified leaves. As well as defending against herbivores, spines help prevent water loss by reducing air flow close to the cactus and providing some shade. In the absence ofleaves, enlarged stems carry out photosynthesis.
Why are the leaves reduced to spines in a cactus plant?
In case of cactus or xerophytic plants, leaves are redued to spines to prevent loss of water through transpiration and stem performs the process of photosynthesis.
Do cactus roots go deep?
You might think cacti would grow deep roots to search for a constant supply of groundwater. Instead, they often develop extensive, shallow root systems that sit just under the surface of the Earth and can extend several feet away from the plant, ready to absorb as much water as possible.
What advantages does a plant have if leaves are reduced to spines?
EXPLANATION: Leaves lose water by the process of transpiration but cactus grows in deserts and cannot afford to lose water. The spines of the cactus store water. They reduce air flow around cactus and help the plant to get enough water by storing it.
In which plant leaves reduced to spines?
Answer: Leaves are reduced to spines in a cactus because due to heat the water present in cactus would dry up if it had leaves.
What will happen if a cactus does not have spines?
They all grow just fine. Theoretically they would be more susceptible to predation by animals because of their lack of defensive spines, but that can’t be too much of a problem because these species survive instead of being eaten into extinction.
How long can a cactus live for?
In the wild cacti can live for hundreds of years. Indoors they may survive for 10 years or more.
What are 2 types of roots?
Root tips ultimately develop into two main types of root systems: tap roots and fibrous roots. The growing root tip is protected by a root cap.