A liger is an offspring produced from a mating between a male lion and a female tiger. Male ligers cannot produce offspring. This is an example of
A. a prezygotic mechanism.
B. hybrid inviability.
C. hybrid sterility.
D. hybrid breakdown.
E. a prezygotic mechanism and hybrid sterility are correct.
C. hybrid sterility.
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The major difference between aerobic and anaerobic respiration is the final electron acceptor at the end of the electron transport chain.
Answer the following statement true (T) or false (F)
Which of the following contributed to the growth in human population that began about 11,000 years ago?
a. sidestepping limiting factors b. increased carrying capacity c. all of the choices d. geographic expansion
What is the basic structure of most lipids?
A) A glycerol head and up to three fatty acid tails B) A linear chain of individual monomers C) A branched chain of individual monomers D) A chain of fatty acid tails
Heart cells in the embryo will be derived from which germ layer?
A) mesoderm B) ectoderm C) endoderm D) none of the above