You Find a Microscope Slide Labeled "Whole Mount of Early

question 157

Multiple Choice

You find a microscope slide labeled "Whole mount of early cleavage stage embryo," but the part of the label identifying the organism is missing.Upon observing the embryo under the microscope, you see that the embryo was mounted when it was undergoing its second cleavage and that the two cleavage planes are at a right angle.From this, you are able to conclude that the embryo is from a(n)

• A) fish and was most likely found floating freely in water.
• B) bird and was obtained after the egg had been laid.
• C) amphibian and was most likely found encased in jelly in water.
• D) placental mammal and was most likely removed from a female's oviduct.
• E) fruit fly and was most likely from an old laboratory experiment.

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