Fill in the blanks to complete each statement about igneous rock formation.

rocks form when
cools below Earth’s surface.

rocks form when
cools on Earth’s surface.

Match the types of competition to their descriptions.

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.

One of the purposes of transcription is to produce a sequence of bases that