Which is not a general characteristic of populations? a) they interact with other populations in an ecosystem. b) they grow and decline overtime. c) they are subject to limiting factors such as food supply and predators. d) they consist of all he species in a defined area.

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 represents a negative impact of technology

Plants consume most of their carbon from a. the soil b. the water c. the roots d. the air