Question

7. ____ is a chemical compound that forms tangled fibers in the cell walls of plants.

A. stomata
B. cambium
C. cellulose
D. cuticle

9. The most common types of plants on earth is ___.
A. angiosperms
B. gymnosperms
C. nonvascular plants
D. seedless vascular plants

Answer 1

1. option C. cellulose

2. option A. angiosperms (I found in Internet that they represent 80% of the green plants)