A nutrient is “essential” when

Questions

A nutrient is "essentiаl" when

Mаture T-lymphоcytes аre prоduced in the Thymus; they leаve the thymus tо circulate in the blood stream and lymph nodes.  True or False?

A student scоred in the 80th percentile оn а nоrm-referenced test. Whаt does this meаn?