American sycamore (Platanus occidentalis) and European sycamore (Platanus orientalis) are tree species that will interbreed if planted nearby but will not normally interbreed because they occur on different continents. This is an example of
A. temporal isolation.
B. habitat isolation.
C. gametic isolation.
D. mechanical isolation.
E. behavioral isolation.
Answer: B
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The "X" shaped chromosomal hereditary material can be packaged in this organelle in eukaryotic cells but not in prokaryotic cells. This organelle is the:
A. ribosomes. B. mitochondria. C. nucleoid. D. chloroplast. E. nucleus.
Which of the following statements is true regarding neurotransmitters and synaptic signaling? Select all correct choices
A. All neurotransmitters are also hormones. B. All synaptic signaling is rapid. C. All synaptic signaling occurs between nerve cells. D. All neurotransmitters are released into the blood stream.
In the rumen, the carbohydrate fermentation end products include
A. methane. B. acetate. C. carbon dioxide. D. All of the choices are correct.
The theory of ________ postulates that the number of species on an island represents a dynamic equilibrium between the immigration of new species and the extinction of previously established species
Fill in the blank(s) with correct word