Plant systematics and evolution

Question 1

What are the 12 most used plants by tonnage?

Answer 1

1. Sugar cane
2. Corn
3. Rice
4. Wheat
5. Potatoes
6. Sugar beet
7. Manioc/cassava
8. Palm oil
9. Soy
10. Tomato
11. Barley
12. Water melon

Question 2

Approximately how many terrestrial plants are there? What percentage of these are flowering plants

Answer 2

Of the ~400 000 terrestrial plants, 90% are flowering

Question 3

Approximately how many species of plant are regularly used?

Answer 3

~15-20 species