The amount of carbon 14 (C-14) in a fossilized Gingko plant is determined to be   of that of a current living Gingko plant.  How old is the fossil? (Only put the numerical value.) Note: the half-life of C-14 is 5,700 years.  (Use the calculator in Honorlock if needed.)  

What is the purpose of the brown round structures? (Do not put “reproduction”.)

The specimen indicated by letter A is a ___________ diatom.   

State one benefit of bacteria to humans.

In the life cycle of a plant, which of the following processes begins the sporophyte generation?

The organism shown is . The arrow is pointing to the .   

Which of the following form of fossilization would most likely retain genetic information.  Select the two best answers.

What is the dark structure inside the organism indicated by the arrow?

List one protist that obtains its food by photosynthesis. Be specific.

Streptobacillus moniliformis is a species of bacteria that causes rat bite fever. Which of the following is true of these bacteria?