Allelopathy is
A. interference competition.
B. the secretion of toxins into the environment by plant roots.
C. intraspecific competition.
D. the transmission of viruses from deer to rabbits.
E. the movement of genes from one species to another.
B. the secretion of toxins into the environment by plant roots.
You might also like to view...
Human caused introductions can occur by which of the following? Check all that apply.
_____ plants and animals accidentally escaping from ships _____ automobile or truck tires _____ being in the soil or on a plant sold at a nursery _____ seeds or organisms attaching to clothing or shoes _____ international cargo ships releasing ballast water in the ocean before arriving at port
How are the cells of a multicellular animal connected to the external environment? Briefly describe how nutrients and wastes are transferred from these cells to the external environment.
What will be an ideal response?
Where do global air circulation patterns begin?
a. At 60o N b. At 30o S c. At the equator d. At 30o N e. At the poles
Chrysanthemums are short-day plants, requiring a night length of longer than 12 hours to flower
Under which of the following conditions should chrysanthemums flower? 1: Night length 14 hours, day length 10 hours 2: Night length 10 hours, day length 14 hours 3: Night length 14 hours, day length 10 hours; night interrupted in the middle by an intense red flash 4: Night length 10 hours, day length 14 hours; day interrupted in the middle by half an hour of darkness
a. only 1 b. only 2 c. both 1 and 3 d. both 2 and 4 e. 2, 3, and 4