Q: You are presented with the question "What aren't diseases caused by?" and the following answer choices:  - ovaries  - bacteria  - A drug.  - humans  - cells  - infection  - virus  - cats  Now knowing that populations of viruses do not grow through cell division because they are not cells and viruses are the cause of many diseases, choose the best answer.
A: cells


Q: You are presented with the question "What uses stems to store water?" and the following answer choices:  - bacteria  - humans  - Oak  - rocks  - trees  - ferns  - fens  - amoebae  Now knowing that astem is used to store water by some plants and ferns are vascular plants, choose the best answer.
A: ferns


Q: You are presented with the question "What is one thing most single-celled organisms have in common?" and the following answer choices:  - Energy  - glucose  - bacteria  - motility  - Energy.  - heat energy  - resistance  - warmth  Now knowing that most protists have motility and protists Protists are single-celled organisms, choose the best answer.
A: motility


Q: You are presented with the question "What must an animal find to ensure survival?" and the following answer choices:  - disaster  - warmth  - food  - space  - predators  - smell  - mate  - DNA  Now knowing that an animal needs to attract a mate to reproduce and every member of every species needs to meet the challenges of survival and of reproduction, choose the best answer.

A: mate