The most likely explanation for why toothed whales have a blowhole is
A. blowholes are better for breathing underwater than gills are.
B. they evolved from an animal with gills.
C. they evolved from an animal with nostrils.
D. blowholes are better for large animals.
Answer: C
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a. molecule, macromolecule, atom, cell b. cell, atom, molecule, macromolecule c. atom, molecule, macromolecule, cell d. atom, cell, molecule, macromolecule
Briefly explain why viruses are not considered living organisms
What will be an ideal response?
Which organism possesses a three-chambered heart?
a. human b. amphibian c. arthropod d. bird e. fish
Molecular biologists rely on many, often sophisticated, techniques to pursue their discipline. Ultracentrifugation, electron microscopy, X-ray diffraction, electrophoresis, and computer interfacing are fundamental tools
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