All of these animals are mollusks except
A. chitons.
B. scallops.
C. squids and octopuses.
D. flatworms.
E. terrestrial snails and slugs.
D. flatworms.
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Polymerases also have nuclease activities. Which of the following is not a use for the nuclease activities of DNA polymerase I?
A. proofreading during synthesis B. trimming single-stranded ends C. removal of RNA primers D. degradation of viral DNAs E. removal of DNA lesions during repair
Plasmodesmata are ____
a. used in energy transformations within the cell b. typical of animal cells more than plant cells c. arrays of adhesion proteins that join epithelial cells and collectively prevent fluids from leaking between them d. open channels that extend across plant cell walls to connect the cytoplasm of adjacent cells e. complex mixture of extracellular cell secretions
Which of the following statement is incorrect about warts?
A. They include deep plantar warts on the soles of the feet. B. Topical salicylic acid can be used for removal. C. They are frequently cancerous. D. They are caused by human papillomaviruses (HPV). E. They are transmitted by direct contact or fomites.
You are looking at diagrams of cells in the process of division and are uncertain as to what process you are viewing (mitosis or meiosis). You determine that the cells you are looking at have 7 chromosomes
You can confidently assume that these cells are in which phase, based on this odd chromosome number? A) metaphase B) metaphase I C) metaphase II D) All of the above are true.