WONDER #966: How Does a Cactus Live Without Water?
Question 1 of 3
How many types of cacti are there in the world?
- over 2,000
- 1 million
- 256
- over 20,000
Question 2 of 3
The prickly spines of cacti are actually highly-modified what?
- defense mechanisms
- plant organs
- pieces of bark
- leaves
Question 3 of 3
If you ever get stranded in the desert, opening up a fully-grown saguaro cactus might provide you with how much water if it has rained recently?
- 1 gallon
- 40 gallons
- up to 200 gallons
- over 1,000 gallons
Check your answers online at https://www.wonderopolis.org/wonder/How-Does-a-Cactus-Live-Without-Water.