When cloning a sheep, the step that IMMEDIATELY follows the isolation of an egg cell from one sheep and a mammary cell from another sheep and removing the nucleus from the egg cell is:
a) removing the nucleus from the mammary cell.
b) transplanting the embryo into the womb of a surrogate mother sheep.
c) fusing the mammary cell, including its nucleus, with the egg cell.
d) initiating cell division.
e) growing the embryo in culture.
Ans: c) fusing the mammary cell, including its nucleus, with the egg cell.
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Endospores of certain bacterial species can enter tissues in the human body, germinate, and cause an infectious disease.
Answer the following statement true (T) or false (F)
Carbon has an atomic number of 6. Carbon-14 has _____
a. 6 neutrons and 6 protons b. 6 neutrons and 8 protons c. 8 neutrons and 6 protons d. 14 neutrons and 6 protons e. 14 protons and 6 neutrons
Which of the following is not a reason to explain why fewer animals live in freshwater than in the
ocean? a. Freshwater is generally hypotonic to tissue fluids. b. Freshwater generally has a less constant temperature environment. c. Freshwater generally has a less constant oxygen environment. d. Freshwater generally is more turbid. e. Freshwater generally contains less food.
The honeycreepers are a group of Hawaiian birds with many different species that all evolved from a single species that migrated from the Americas. Of which pattern of evolution is the speciation of the honeycreepers most likely to be an example?
a) autopolyploidy b) allopolyploidy c) adaptive radiation d) convergent radiation e) convergent evolution