The Pr → Pfr conversion cycle is known to control various growth functions in plants. Which of the following functions does the cycle NOT control?

Which of the following statements best describes a herbaceous eudicot stem?

Consider the possibility that we discover a gene that regulates both the amount of root hairs and where root hairs grow on a root tip. Since the surface area provided by root hairs is so critical to their uptake of water and nutrients, expanding their growth area seems a great advantage. However, which of these might be a problem?

The transpiration rate in plants is increased by all of the below factors EXCEPT

As a botanist working for a field museum, you spend many hours in the field looking for new species. On a recent trip you may have discovered a new plant species. The plant is very short, and has a stem but no roots or leaves. The stem forks and has branches that have sporangia on the tips. Further analysis reveals vascular tissue. What type of plant might you have discovered?

Determine which of the following scenarios would be most likely to occur if the cyanobacteria was removed from a lichen.

What is the correct order of reproduction in members of phylum Zygomycota? a. Hyphae of opposite mating strains touch each other. b. Gametangia merge, nuclei pair and fuse. c. Spores are released from the sporangium. d. Gametangia form at the end of the hyphae. e. A thick wall develops around the zygospore.

All of the following statements about mycorrhizae are true EXCEPT

Arbuscular mycorrhizal fungi invade plant roots, with many species forming mutualistic associations that benefit both the fungus and the plant.

Identify the species that is NOT classified as a pteridophyte.