Which of the following is NOT an example of mechanical weathering? A. A large rock splits due to ice wedging.
B. Oxidation causes rust on the rock.
C. Moving water causes abrasion as rocks collide with one another and break apart.
D. Plant roots grow in the crack of a rock.

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.

Which of the following is an abiotic factor in an ecosystem? a. bacteriab. airc. niched. grass(abiotic=non-living) me !

Cells control gene expression at which steps