Most caves and caverns originate by solution of limestone.

a. true

b. false

Which type of light is restricted to movement in only a given direction A. Polarized B. Diffracted C. Sunlight D. Refracted

Blood glucose levels are regulated by which organ? A) heart B) blood vessels C) kidneys D) pancreas

Which parts of soil are classified by their particle size? Check all that apply. bedrock clay humus sand silt

What kind of stem cell can develop into any kind of of cells in the human body, but not cells of the placenta? A. Pluripotent stem cells B. Unipotent stem cells C. Multipotent stem cells D. Totipotent stem cells

What do the cysts of brine shrimps, resurrection fern and the tardigrades have in common?

Which property allows objects that do not produce their own light to be seen

What is an example of recombinant dna technology?

How many chromosomes do humans with down syndrome have?

Which trophic level has the least amount of energy available for the next highest trophic level? a. secondary consumerb. omnivorec. decomposerd. producer

What is an acquired trait?