In fishes, reptiles, and mammals, which protein carries oxygen in the blood?
| Tubulin | |
| Actin | |
| Hemoglobin | |
| Myosin | |
| Keratin |
Which of the following lifestyle patterns would most benefit hermaphroditic individuals?
| Animals that do not come into contact with others of the same species very often | |
| Animals that change their sex, depending on the temperature of the water | |
| Animals that can only feed at night | |
| Animals that are social and live in large groups | |
| Animals that never learned how to reproduce |
Which of the following is the main source of food for soft-bottomed intertidal communities?
| Cordgrasses | |
| Seaweeds | |
| Phytoplankton | |
| Detritus | |
| Oxygen gas |
Which type of sediment might a researcher expect to find in a calm area with little exposure to wave action or surf?
| Very fine sand | |
| Coarse gravel | |
| Coarse sand | |
| Bedrock | |
| Large rocks |
What determines the sex of a sea turtle’s offspring?
| The temperature of the environment | |
| The sex of the first sibling to hatch | |
| The age of the mother | |
| The size of the egg at hatching | |
| The distance migrated to natal beach |
Which of the following are characterized by having segmented, bilaterally symmetrical body plans with jointed legs?
| Echinoderms | |
| Arthropods | |
| Mollusks | |
| Chordates | |
| Cnidarians |
Which of the following fishes is an example of a demersal fish?
| A bat ray | |
| A marlin | |
| An eel | |
| A tuna | |
| A sea horse |
