What do these features of seeds all have in common?

Colombia is the only South American country to border on which two bodies of water? If you've had an enlarged lymph node under your jaw for a year after a root canal should you do something about it? Have animals at the zoo got freedom? What is a major lake river or mountain in the Bahamas? Name the four major deserts of north America? How much rain falls in a rain forest each year? Which river is biggest out of these Amazon River Mississippi river river Danube the Yangtze river the indus river or the Congo river? Where is the West Coast Clock And Watch Museum in Bellingham Washington located? What country borders both the red sea and Persian gulf? How tall is the stautue of liberty? How many people have drowned in the Nile? What tree is only found in sarawak? Why should the public be kept away from a pregnant gorilla in a zoo? How many acres is long lake Sinclair Maine? On Six Flags fun park where is the giant fish? How do mangrove trees help coral reefs? Why is Mount Everest important to china? Why was the Huang river called the river of sorrows? What is a building on the Thames river called? How was The Great Wall of China protected?

What do these features of seeds all have in common?