Which of these ecosystems has the lowest productivity?
A. temperate forest
B. open ocean
C. savanna
D. lakes
E. tropical forest
Answer: B
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What is a typical habitat for carnivorous plants?
A) wet areas with high salinity B) wet areas with high levels of humus C) wet areas with low decomposition rates D) dry areas with low levels of available oxygen E) dry areas with high levels of peat
After giving birth, female bighorn sheep lick their newborn lambs. This behavior continues off and on for up to 6 hours, after which mothers no longer lick their lambs. What is/are the ultimate cause(s) of this behavior? Check all that apply.
_____ Hormones released during labor stimulate motor neurons in female bighorn sheep, causing them to lick and groom their lambs. _____ The lamb is stimulated by the licking to begin nursing from its mother and the sooner a lamb begins nursing, the better its chances for survival. _____ Female bighorn sheep remember being licked by their mothers and know they must teach this behavior to their own offspring. _____ Licking the lamb removes excess moisture from its coat, preventing hypothermia. _____ When licking the lamb, the mother learns its unique scent so she can distinguish it from other lambs and offer it protection from predators or extreme weather.
Atherosclerosis ____
a. decreases arterial lumen size b. affects the diameter of veins c. has no effect on arterial lumen size d. increases arterial lumen size e. presents many clinical symptoms immediately
In a spinal cord injury, nerve signals cannot proceed past the location of the injury. What part of the spinal cord was damaged if a person, who is quadriplegic, can move their head and neck, but not their arms, abdomen, or legs?
A. thoracic B. lumbar C. cervical D. sacral E. coccyx