Question: If arthropods have no backbone, then what have no backbone?  Answer choices: - insects  - mammals  - arthropods  - humans  - barnacles  - fur seals  - graptolites  - bears
Answer: arthropods

Question: If organelles contain chlorophyll, then what do organellescontain?  Answer choices: - Energy  - honeybees  - sensory neurons  - matter vibrating  - aerobic capacity  - bioaerosols  - alveoli  - chlorophyll
Answer: chlorophyll

Question: If lake beds were often formed by a flowing river, then what is a common cause for the development of a lake bed?  Answer choices: - paralysis  - thunder and lightning  - flowing river  - erosion  - rainfall  - flooding  - Sediment  - fulmination
Answer:
flowing river