Which of the following are not used by protists for protection against predators?
A. protective coverings that are hard, tough, or slimy
B. toxins
C. gamma radiation
D. shooting sharp projectiles
E. spines
C. gamma radiation
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Social insect colonies are composed of highly specialized groups called what?
A. clines B. ecotypes C. castes D. species E. filial relatives
Examine the picture to answer the following questions and identify the labeled structures. 
A:________B:________C:________D:________E:Is the neuron pictured a sensory, association or motor neuron? What is its function?F:Is the neuron multipolar or unipolar? Explain your answer.
What will be an ideal response?
Cell division in the apical meristems at the tips of a plant that results in increases in height or length is called
A. mitotic growth. B. secondary growth. C. primary growth. D. herbaceous growth. E. vascular cambium growth.
DNA replication and gene expression in archaeans more closely resemble eukaryotic cells than the same processes in bacteria. However both Bacteria and Archaea are prokaryotic. What does this suggest?
A. Bacterial cells are not related to archaeans. B. There must have been two origin events, one producing the bacteria and the other producing archaeans and eukaryotic cells. C. Eukaryotic cells are descended from modern archaeans. D. Eukaryotic cells shared a more recent common ancestor with archaeans than with bacterial cells.