The development of a shelled egg allowed the ____ to become completely adapted to land. 

A. mammals
B. insects
C. reptiles
D. amphibians


C. reptiles

Biology & Microbiology

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A DNA molecule containing 32% thymine would contain how much cytosine?  

A.  18% B.  32% C.  36% D.  64%

Biology & Microbiology

Thick filaments are parallel bundles of ____ molecules

a. actin b. tropomyosin c. acetylcholine d. myosin e. troponin

Biology & Microbiology

Herpes and other enveloped viruses enter their

host cells a. through pores. b. by dissolving the host plasma membrane. c. by fusion of the viral membrane with the cell’s plasma membrane. d. by activating transport proteins in the host cell's plasma membrane. e. any of these

Biology & Microbiology

 TRAIT    SPECIESABCDE111011210010310011411111511111600010 The table shows the distribution of traits (A-E) in six extant species (1-6). A "0" indicates the ancestral condition, and a "1" indicates the derived condition. Which trait is least informative of phylogenetic relationships within the group?

A. A B. B C. C D. D E. E

Biology & Microbiology