Cracking the AP Biology Exam


Diversity of Organisms


Directions: Each of the questions or incomplete statements below is followed by five suggested answers or completions. Select the one that is best in each case. Answers can be found on this page.

1. A unicellular organism is discovered that has the following characteristics: a nucleus, a cell wall, and photosynthetic organelles. This organism is most likely to be classified as

(A) a protist

(B) a fungi

(C) a plant

(D) an animal

(E) a bacteria

2. Insects and spiders are classified as arthropods because they are both equipped with

(A) jointed legs, a chitinous exoskeleton, and wings

(B) segmented bodies, a chitinous exoskeleton, and wings

(C) segmented bodies, a chitinous exoskeleton, and a closed circulatory system

(D) jointed appendages, segmented bodies, and an open circulatory system

(E) jointed legs, three body parts, and a chitinous exoskeleton

3. A student observes an organism under a microscope. It is unicellular, eukaryotic, has threadlike branches, and a chitinous cell wall. Which kingdom is the organism most likely to be classified under?

(A) Fungi

(B) Monera

(C) Protista

(D) Animalia

(E) Plantae

4. Which of the following animals possess nephridia?

(A) Fish

(B) Amphibians

(C) Flatworms

(D) Earthworms

(E) Insects

5. All of the following are classes of vertebrates EXCEPT

(A) Reptilia

(B) Arthropoda

(C) Mammalia

(D) Amphibia

(E) Aves

6. All of the following are true concerning fungi EXCEPT

(A) they reproduce sexually and asexually

(B) they are eukaryotic

(C) they are photosynthetic

(D) they require O2

(E) they have a cell wall

7. Nitrogen-fixing bacteria are abundant in soils and convert atmospheric nitrogen into nitrates. Plants are able to use the nitrates to synthesize plant proteins. This is an example of

(A) mutualism

(B) parasitism

(C) commensalism

(D) competition

(E) tropism

8. Which of the following characteristics is (are) found in all viruses?

(A) A nuclear membrane

(B) A cell wall

(C) A protein coat

(D) Membrane-bound organelles

(E) Ribosomes

Directions: Each group of questions consists of five lettered headings followed by a list of numbered phrases or sentences. For each numbered phrase or sentence, select the one heading that is most closely related to it and fill in the corresponding oval on the answer sheet. Each heading may be used once, more than once, or not at all in each group.

Questions 9–12

(A) Conjugation

(B) Transduction

(C) Transformation

(D) Plasmid

(E) Spores

9. The transfer of genes between two E. coli joined by a sex pilus

10. A section of bacterial DNA is packaged in a virus and transferred to a new host cell

11. Small rings of bacterial DNA that carry accessory genes

12. A bacteria takes up segments of naked DNA