Which statement about the internal biological clock is not true:a
is known as a circadian rhythm.
b. is related to the opening and closing of stomata.
c. includes the sleep movements observed in some plants, such as beans.
d. may involve both phytochrome and cryptochrome.
e. disappears abruptly if it is not reset by the rising and setting sun.
E
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Which organism causes the highest number of sexually transmitted diseases each year?
A) Neisseria gonorrhoeae B) Treponema pallidum C) Chlamydia trachomatis D) Trichomonas vaginalis
Given the fact that their respiration rate increases rapidly during activity but is slow to decrease following activity, does it seem likely that scorpions chase their prey over long distances?
a. Yes b. No
What would happen when parathyroid hormone is released from the parathyroid?
What will be an ideal response?
Concentrations of trace elements in an environment above what is required by organisms generally have no effect on those organisms. Which of the following is a valid response to this statement?
a. True. Only trace element limitation can lead to disease among organisms. b. True. Most organisms have evolved adaptations that allow them to tolerate very high concentrations of trace elements in the environment. c. False. Elevated concentrations of some trace elements such as cobalt and chromium can be toxic. d. False. Elevated concentrations of trace elements such as chromium and phosphorus can be toxic. e. False. Increasing the concentration of trace elements above what is required generally has a beneficial effect on organisms.