1. Which of the following is NOT an essential characteristic required of an organism to be classified in the phylum Chordata? a. Dorsal, hollow nerve cord
b. Notochord
c. Pharyngeal pouches
d. Vertebrae

2. An animal’s kidneys pump ions across cell membranes, allowing water to move by osmosis. This helps the animal to…

a. Remove extra ions
b. Conserve water
c. Reduce ion concentration
d. Reduce water concentration

3. Which TWO of the following are evidence that meiosis has just occurred in a life cycle of an organism?

a. A diploid (2N) zygote
b. A diploid (2N) adult organism
c. A haploid (1N) egg
d. A haploid (1N) sperm

4. Which of the following animals reproduces by external fertilization, where the female releases her eggs outside of her body before the male covers them with his sperm?

a. Salmon
b. Deer
c. Duck
d. Goose

5. Which of the following is an example of insight learning?

a. a chimpanzee figuring out how to use a new tool to obtain a hidden food source
b. a dog drooling when it hears a can of food being opened
c. a squirrel ignoring passing cars as it eats nuts a few feet from the road
d. a baby sea turtle going into the ocean right after it hatches

6. According to the image below, which of the following animals does not have true bones?

a. salamander
b. coelacanths
c. sharks
d. birds

7. Which two phyla of animals are probably closely related because they are both classified as deuterostomes due to having the same pattern of embryonic development?

a. Arthropods and cnidarians
b. Sponges and nematodes
c. Annelids and mollusks
d. Chordates and echinoderms

8. Which of the following are both characteristics of plants but NOT animals?

a. chloroplast and lysosomes
b. cell wall and chloroplasts
c. cell membrane and mitochondria
d. cell wall and cell membrane

9. An animal with sharp canine teeth is adapted for what type of food source?

a. meat
b. green, leafy plants
c. seeds
d. insects

10. When you investigate an animal, you find an unfamiliar organ, and you notice that it’s connected to the outside of the body. It has a lot of very thin membranes that surround small open spaces. These membranes have a lot of surface area, stay slightly moist, and have many small blood vessels just under the surface. What is this organ probably used for?

a. Obtaining food
b. Producing offspring
c. Bringing in oxygen
d. Protection and immunity