(7th grade question about rocks) Water fills a small lake in a dry region. After a few weeks, the lake evaporates, leaving behind a thin layer of crystals that form from minerals dissolved in the lake water. Each year, a new layer is added. Which type of rock is MOST likely to be formed by this process?

A-igneous
B-metamorphic
C-no rock
D-sedimentary

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.

Common symptoms of an iron-defiency anemia include muscle weakness shortness of breath and lightheadedness why does iron deficiency causes these symptoms

Which of the following is required of a new drug?me