Short-day plants are those that flower only when the night period of a plant is
A. longer than a defined period.
B. shorter than 12 hours.C.
followed by short periods of light interruptions.
D. less than that in summer.
E. longer than 12 hours.
A. longer than a defined period.
You might also like to view...
Humoral immunity involves all the following except:
A) antibodies. B) antigens. C) NK cells. D) plasma cells.
Which causes the most stress to overloaded municipal wastewater plants?
A. Antibiotic resistant bacteria in the system B. Population growth associated with increased volume delivered to the plant C. Too many people who flush prescription drugs down the toilet D. Global warming
Which of these are forms of natural host resistance?
a. intact skin, antibodies, lysozyme b. intact skin, mucus, antibodies c. stomach acid, mucus, antibodies d. intact skin, stomach acid, mucus
In the phylogenetic tree above, which of the following groups is most closely related to mammals?
a. snakes b. amphibians and all reptiles are equally related c. all reptiles and birds d. all reptiles but not birds e. amphibians