When two species of meadowlarks with different mating songs are considered, which type of reproductive barrier is involved?
a. gametic
b. temporal
c. behavioral
d. habitat
e. mechanical
Answer: c. behavioral
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A) mutation B) asexual reproduction C) sexual reproduction
The peripheral nervous system is composed of:
A. sensory neurons. B. cranial nerves. C. spinal nerves. D. All of the answer options are correct.
In this figure showing SDS-PAGE of the progressive stages of glycine N-methyltransferase purification, the marker lane indicates that the purified protein:
A. has approximately 32,000 amino acids. B. has a molecular mass of approximately 32,000. C. has a positive charge and a molecular mass of approximately 32,000. D. has a negative charge and a molecular mass of approximately 32,000. E. is only present when cells are induced with glycine.
Zoogloea form flocculent masses in
A) anaerobic sludge digestion. B) primary sewage treatment. C) activated sludge digestion. D) tertiary sewage treatment. E) water treatment.