The interlocking rib cage of Titaalik roseae suggests that this transition organism had lungs, which of the following traits were also found in T. roseae but not in the ancestral form?
A. An upright stance.
B. Wings.
C. Primitive wrist and five finger-like bones.
D. Live young.
E. Articulating hip bones.
C. Primitive wrist and five finger-like bones.
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A double-stranded DNA molecule contains a total of 120 purines and 120 pyrimidines. This DNA molecule could be composed of _____
A) 120 adenine and 120 uracil molecules B) 120 thymine and 120 adenine molecules C) 120 cytosine and 120 thymine molecules D) 120 adenine and 120 cytosine molecules E) 120 guanine and 120 thymine molecules
Your favorite tree is dying, and you find that there is a fungal infection on its leaves. If you were to
look at the cells of the infected leaves of your tree, which of the following should you expect to find?
a. mycorrhizae b. arbuscules c. haustoria d. both mycorrhizae and arbuscules e. both mycorrhizae and haustoria
Name two forms of recombination in bacteria
A) auxotrophic and prototrophic B) conjugation and transduction C) mixed and generalized D) lytic and lysogenic E) insertion and replication
All infectious diseases
A. are caused by microorganisms or their products. B. only occur in humans. C. involve viruses as the pathogen. D. are contagious. E. are caused by vectors.