Identify and describe the parts you can see. Make a prediction about whether the flower has a simple or a complex structure.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

What are the pros and cons of quadrat sampling?

Which of the following must be true for a fossil organism to be useful as an index fossil? a. the fossil organism must be widespread geographically. b. the fossil organism must be abundant. c. the fossil organism must be limited to a short span of geologic time. d. all of the above.