Where is the location for chytrid to be found?

In addition to seeds, which of the following characteristics are unique to the seed-producing plants? a) sporopollenin b) lignin present in cell walls c) pollen d) use of air currents as a dispersal agent e) megaphylls

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

What kinds of molecules can pass through the cell membrane without any problem?