Mary is in the lab studying the bones shown in the picture below. Tom says she is doing comparative anatomy because she is doing what? A- looking at fossils of organisms that have gone extinct
B- looking at embryos of unrelated living organisms
C- looking at similarities and differences in the structures of different species
D- looking at sexual dimorphism of sexually reproducing species​

An easy way to calculate the amount of energy available at each level is to what?

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.

Which of the following describes the difference in stimuli required to detect a difference between the stimuli? a. just noticeableb. signal detectionc. subliminald. top down