1. The tall, fair-skinned Vikings became known as brutal fighters and robbers. a. True.
b. False.

The seed coat's most important function is to provide a) a nonstressful environment for the megasporangium. b) the means for dispersal. c) dormancy. d) a nutrient supply for the embryo. e) desiccation resistance.

As the earth formed, the force of gravity increased due to increased mass. what effect did this increased gravity have on the forming planet?

Which of the following molecules could pass through the plasma membrane by simple diffusion? a. na+ ions b. glucose c. amino acids d. carbon dioxide