Which of the following statements is true regarding the mark-and-recapture method?
A. It assumes that the size of the population
of interest remains constant between the
initial mark and subsequent recapture
measurements.
B. It can be represented by the equatiAon: N
= C/R x M.
C. It can rely on members of a species being
identified by physical characteristics (i.e., fin
markings on whales).
D. It is used to estimate the size of a
population of interest.
E. All of the answer options are correct.
F. None of the answer options is correct.
E
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A group of individuals that can interbreed in nature and produce viable offspring would be considered to be a species according to the
A. phylogenetic species concept. B. biological species concept. C. evolutionary species concept. D. ecological species concept. E. general lineage concept.
In fish, blood flows in a direction opposite to the flow of water over the gills in a process known as:
a. concurrent exchange. b. countercurrent exchange. c. crosscurrent exchange. d. exhalation. e. diffusion
Heterospory is believed to have led to the evolution of:
a. eggs. b. seeds. c. xylem. d. phloem. e. pollen.
Organs in the coelom of an animal are held in place by the
A. muscles. B. bones. C. inner tube. D. mesenteries.