According to the competitive exclusion principle, the populations of two species that live in the same place and have exactly the same ecological requirements
A) can coexist at the same carrying capacity (K) as when each population is separate.
B) can coexist but with the population of each species at half of the carrying capacity (K) as when each population is separate.
C) can coexist but with the population of one species much higher than that of the other species.
D) cannot coexist because one species will eventually drive the other to extinction.
D
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A population ecologist is study the
demographics of American bison living on a grassland in North Dakota. She captures, marks, and releases 100 bison. Later, she recaptures 100 bison and discovers that 50 were previously marked and half of those marked are of reproductive age. What is the population ecologist’s estimate of how many bison in the total population are of reproductive age?
a. 200 b. 50 c. 100 d. 20 e. 10
What large molecules are essential in determining the structure and function of cells and tissues?
a. RNA b. genes c. proteins d. hormones e. nucleotides
One of the pyrimidine bases in a DNA molecule is adenine
__________________ Indicate whether the statement is true or false.
The interconnectedness of plants, animals, and microbes with each other and their environment.
A) ecosystem B) genetic engineering C) vaccine D) FDA E) population