Select ALL statements about SI units that are supported by the material.

### Why this is right - **The SI system is globally agreed upon.** It is a common standard for scientific measurements. - **Derived units can be built from base units.** Derived measurements combine base quantities mathematically. - **The SI system has seven base units.** These are the starting units for the system. - **Metric prefixes are useful because biological specimens vary greatly in scale.** Prefixes make very small or large measurements manageable. ### The other options - **E. Every biological measurement must use a prefix.** The material says prefixes are used heavily, not that every measurement requires one. ### Terms - **International System of Units (SI)**: the standard system used for scientific measurements. - **Derived unit**: a unit formed from base units. - **Metric prefix**: a power-of-ten factor added before a unit. ### Remember Prefixes are useful tools, not mandatory additions to every measurement.