Considering that the scientific method includes making observations, formulating a hypothesis to explain the observations, testing the hypothesis with experimentation, analyzing data from experiments, and drawing conclusions about the meaning of the data, which of the following statements about a species of flowering plant represents an experiment?

The first stage in the gametophyte generation is  _____.

*In fungi, plasmogamy results in _____.

Many indicators show that temperatures are increasing, and climate patterns are changing on a global scale.  What is NOT a likely result of these changes?

Which ecosystem would be least affected if sunlight did not reach the Earth for an extended period of time?

In a study locality, rabbits are the only prey of coyotes.  Biologists estimated the population sizes of rabbits and coyotes each year for 5 years and the data are shown in the table below.  Interpret these data about predator/prey relationships.    

All animals must get oxygen for respiration.  Which of the following is NOT involved in this critical function?

Two of Darwin’s finches display a character displacement when they occur as sympatric species. Which of the statements correctly interprets the graph?    

According to the phylogenetic tree below, modern-day mammals are most closely related to which modern group of reptiles?

Recent extinctions of species can be attributed to several causes.  Which of the following is not considered a major cause of such extinctions?