What is another word for population density?
A) distribution
B) demographics
C) abundance
D) carrying capacity
C
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According to the Lotka-Volterra equations, which of the following is not an expected outcome of competitive interactions between two species?
A) Species 1 drives species 2 to extinction. B) Species 2 drives species 1 to extinction. C) Both species coexist. D) The populations of both species increase to infinity.
TRAIT SPECIESABCDE101111200111310101401111500001610101 The table shows the distribution of traits (A-E) in six extant species (1-6). A "0" indicates the ancestral condition, and a "1" indicates the derived condition. Which trait is least informative of phylogenetic relationships within the group?
A. A B. B C. C D. D E. E
Circulatory systems have the primary benefit of overcoming the shortcomings of
A) temperature differences between the lungs and the active tissue. B) the slow rate at which diffusion occurs across cells. C) communication systems involving only the nervous system. D) having to cushion animals from trauma. E) fetal organisms maintaining an optimal body temperature.
Old stories tell of gigantic sea serpents, possibly ancient reptiles called plesiosaurs. To prove that they still exist, the most useful scientific evidence would be which of the following?
A) Good photographs of the creatures B) Reliable eye-witness accounts of seeing them C) Unexplained bite marks on fish D) A fresh skull with flesh still attached