Question: Hearing is used for sensing sound by animals, and all sound is caused by vibrations. Given these facts, hearing is used for sensing _ by animals among the following options: - A Greek letter - waves - vibrations - motion - messengers - humans - four limbs - some mammals
Answer: vibrations

Question: Thick fur can be used for keeping warm, and most mammals have hair, or fur, covering their body. Given these facts, most mammals have a body what for keeping warm among the following options: - four limbs - exoskeleton - warm - scales - sweating - covering - bareness - opening
Answer: covering

Question: Roundworms make up the phylum Nematoda, and also, nematoda and rotifera are important groups contributing to soils. Given these facts, where are roundworms useful in an ecosystem among the following options: - killing animals - soils - fields - bacteria - eating plants - wetland - food - alveoli
Answer:
soils