Which of the following protozoans is most likely to cause digestive system disorders? . a. entamoeba from phylum sarcodina . b. trypanosoma from phylum zooflagellata. c. paramecium from phylum ciliata

Afamily has a y-linked disease that affects the father. what is the chance of a male offspring inheriting the same disease? oa. 100% ob. 50% oc. 25% d. 0%

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?

Which of the following is likely not involved in this example of ecological succession? a) the rotting remains of plants add to the fertility of the soil. b)the soil becomes so fertile that eel grass is replaced by other plant species. c) the roots from plants stabilize the sediment, keeping it in place. d) the concentration of salt becomes so high that all plant life is destroyed.