Could a tiny concentration of a contaminant that mimics a hormone affect a plant significantly? why or why not?

Where would you expect to see seedless plants, such as ferns and mosses? a. in a botanical museum, because they are all extinct b. low and close to the ground in a moist environment c. climbing high while circling the branches of another plant d. deeply rooted in a forest with a trunk that reaches 20 meters or more

Why do we perceive objects as retaining their brightness under different lighting levels?

The function of the excretory system is to control homeostasis and