*Question*
Q: Vertebrates have tissues which are organized into organs which in turn are organized into what? Choices: - artificial systems - information systems - maturation systems - organ systems A:
**Answer**
organ systems

*Question*
Q: Colonial organisms were probably one of the first evolutionary steps towards which type of organisms? Choices: - double cellular - mutated - fetus - multicellular A:
**Answer**
multicellular

*Question*
Q: What are colonies of cells stuck to a surface called? Choices: - membranes - cellular coating - membranes - biofilms A:
**Answer**
biofilms

*Question*
Q: What is responsible for the development of antibiotic-resistant strains of bacteria? Choices: - mosquitoes - flu shots - negative mutations - bacterial mutations A:
**Answer**
bacterial mutations