When energy leaves the Sun's core, it first moves into the .

A. corona
B. radiative zone
C. chromosphere
D. convective zone

The body is protected against harmful flu viruses by

Aresearcher has developed two stains for use with seed plants. one stains sporophyte tissue blue; the other stains gametophyte tissue red. if the researcher exposes pollen grains to both stains, and then rinses away the excess stain, what should occur? a) the pollen grains will be pure red.b) the pollen grains will be pure blue.c) the pollen grains will have red interiors and blue exteriors.d) the pollen grains will have blue interiors and red exteriors.

In what for do plants utilize nitrogen? why do they need nitrogen?