Biology Unit 2 Exam

What distinguishes bacteria from archaea?

Which of the following statements best describes the term synapomorphy?

In marine ecosystems, the main primary producers are ______

Protists and bacteria are grouped into different domains because _____

Which of the following is the best evidence that all life evolved from prokaryotic rather than eukaryotic ancestors?

An organism that is capable of both photosynthesis and heterotrophy is a(n):

While examining a rock surface, you have discovered an interesting new organism. Which of the following criteria will allow you to classify the organism as belonging to Bacteria but not Archaea or Eukarya?

Prokaryotes are classified as belonging to two different domains. What are the domains?

You might be interested to know how many different types of bacteria live on the shower curtain in your bathroom. What is the most efficient method for finding out?

Genetic recombination in prokaryotes is one factor that gives rise to their high levels of genetic diversity. Which of the following are mechanisms of prokaryotic genetic recombination?

In prokaryotes new mutations accumulate quickly in populations, while in eukaryotes new mutations accumulate much more slowly. The primary reasons for this are:

Which of the following represents an area where prokaryotes are more diverse than eukaryotes?

Microbiologists use the Gram stain to aid the identification of bacteria. What is the major difference between Gram-positive and Gram-negative bacteria?

Bacteria that live around deep-sea, hot water vents obtain energy by oxidizing ignorance hydrogen sulfide belched out by the vents. They use this energy to build organic molecules from carbon obtained from the carbon dioxide in seawater. These bacteria are ______

A doctor prescribes an anitbiotic to her parents. For the first few years, the drug works well; but after several years, the doctor sees more patients for whom that antibiotic doesn't work. Which of these explanation best explains what happened?

Primary production by photosynthetic protists is considered "primary" because ____

Locomotive diversity amongst protists include:

What synapomorphy defines the Eukarya?

All protists ______

Which of the following statements is consistent with the assertion that protists are paraphyletic?

What term describes the multicellular haploid form of a protists that shows alternation of generations?

Assume that some members of an aquatic species of motile, photosynthetic protists evolve to become parasitic to fish. They gain the ability to live in the fish gut, absorbing nutrients as the fish digests food. Over time, which of the following phenotypic changes would you expect to observe in this population of protists?

In the process of alternation of generations, the _______

Imagine that there are twenty-five different species of protists living in a tide pool. Some of these species reproduce both sexually and asexually, and some of them can reproduce only asexually. The pool gradually becomes infested with disease-causing viruses and bacteria. Which species are more likey to thrive in the changing environment?