One way in which distributions of populations and species have been responding to climate change is by shifting
A) to lower elevations.
B) toward the poles.
C) toward the equator.
Answer: B
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Which items are MOST routinely irradiated in the United States?
A) fresh fruits B) fish C) canned foods D) herbs and spices
Which is TRUE of succulent plants such as cacti or pineapple?
A. They are C3 plants. B. They are highly efficient at photosynthesis in cooler and wet environments. C. They tend to undergo substantial rates of photorespiration. D. They produce 4-carbon malate in the first step of carbon fixation. E. They continually produce sugar, both day and night under hot arid conditions.
Answer the following statements true (T) or false (F)
1. Overall brain size across mammals (e.g., an elephant vs. a bat) is a good predictor of behavioral complexity. 2. Cranial nerves are connected directly to the brain. 3. The somatic nervous system primarily regulates involuntary responses. 4. The sympathetic and parasympathetic divisions of the autonomic nervous system tend to have opposing actions on target organs. 5. A protein synthesis inhibitor would block learning in a human, but would have no effect in a simple invertebrate like Aplysia.
A prenatal diagnosis procedure that can be performed earlier than amniocentesis involves sampling the _____.
A. yolk sac material B. allantois C. chorion D. yolk sac E. umbilical cord