Which of the following are pioneer species?

Normal Borlaug, who passed away in 2009, pioneered the development of ________.   A) organic agriculture B) IPM C) GM crops D) high-yield wheat E) monoculture farming

Which of these best describes the latitudinal gradient in species richness? A) There tends to be a greater number of species in ecosystems closer to the equator. B) There tends to be a greater number of species in midlatitudes. C) There tends to be a greater number of species in ecosystems farther from the equator. D) The number of species is generally consistent across all latitudes.

The loss of a particular population from a given area (but not the entire species globally) is called ________.   A) extinction B) extirpation C) emigration D) extinguishment E) exposition

________ are federal lands that are off-limits to development but are open to hiking, nature study, and other low-impact public recreational activities.   A) National forests B) BLM lands C) Biosphere reserves D) Wilderness areas E) State parks

In order for livestock to be considered organic, ________.   A) hormones and antibiotics are permitted, but not vaccines B) animals must be fed 100% organic agricultural feed C) animals cannot be transferred from regular treatment to organic standards D) no vitamins and mineral supplements can be used E) animals must be reared under natural conditions in intact ecosystems

A contractor fell off a rooftop, fracturing their second thoracic vertebra and badly dislocating several bones in their right ankle. The diagram shows a superior view of his spinal cord with the damaged portion shaded. Indicate whether each statement would apply to this patient by answering T (true) or F (false). The patient will be able to flex their arm at the elbow on both sides. [armmove]  The patient will be able to extend their right knee on command.[legmove]  The patient will have a knee jerk reflex on the right.[reflex]  The patient will be able to feel a light touch to the sole of their right foot.[legtouch]  The patient will feel the pain of their injured right ankle.[legcold] 

Compare the values below. Which is greater, or are the two values equal? A. Size of receptive field of tactile receptor in fingertipB. Size of receptive field of tactile receptor in arm

A contractor fell off a rooftop, fracturing their second thoracic vertebra and badly dislocating several bones in their right ankle. The diagram shows a superior view of his spinal cord with the damaged portion shaded. Indicate whether each statement would apply to this patient by answering T (true) or F (false). The patient will be able to flex their arm at the elbow on both sides. [armmove]  The patient will be able to extend their right knee on command.[legmove]  The patient will have a knee jerk reflex on the right.[reflex]  The patient will be able to feel a light touch to the sole of their right foot.[legtouch]  The patient will feel the pain of their injured right ankle.[legcold] 

Compare the values below. Which is greater, or are the two values equal? A. Activity of muscle spindles in the quadriceps when hip is flexed and knee extended.B. Activity of muscle spindles in the quadriceps when hip is extended and knee is flexed.