Pollutants vary in their persistence, which means some ____.
A) reside in the environment for thousands of years, whereas others last for only a few minutes
B) are toxic to organisms in tiny concentrations
C) may seem harmless, but could be very deadly to distant species
D) may interfere directly or indirectly to marine populations
Question 2
Pollutants that can be broken down by natural processes into simpler compounds are described as ____.
A) hermatypic
B) sustainable
C) renewable
D) biodegradable
The Environment Influences Gene Expression
Gangrene of the toes and foot as a result of an infection often means eventual amputation.
Cystoscopy. In this procedure, a specialized endoscope with a rigid tube, known as a cystoscope, is
Caregivers’ responses sometimes help a child with strong emotions adapt to the environment.
Essential Environment
Electrophoretic separation of a mixture of DNA fragments that vary in length