Morphological traits are commonly used to identify species, which of the following can also be used?
A. The ability to interbreed.
B. Molecular similarity (DNA and chromosome comparisons).
C. Ecological factors.
D. Evolutionary relationships.
E. All of these.
E. All of these.
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A person with type B blood could safely receive a transfusion of blood from someone with blood type
A) B. B) AB. C) O. D) Both A and C E) Any of these
Which of the following is the most complex level of organization?
A. columnar epithelium B. cardiovascular system C. heart D. brain E. lungs
Which statement about chemoreceptors is NOT true?
A. Chemoreceptors are thought to be the most primitive sensory receptor to have developed in animals. B. Chemoreceptors are universally found in animals. C. Chemoreceptors are found all over the body surface in humans. D. Chemoreceptors are concentrated on the auricles of the head in planaria. E. Chemoreceptors are found on antennae and mouthparts in insects and other arthropods.
Frederick Griffith discovered
A) transformation. B) transposons. C) the lac operon. D) DNA. E) conjugation.