The Earth goes through periodic cycles of cooling and warming.

Probably the main reason Africans, rather than Native Americans, became slaves in America was that? A. Indians passed North American diseases to the Europeans. B. Africans and Europeans shared immunities to Old World diseases. C.

During which of the following processes would carbon most likely be stored? Burning of coal Formation of fossil fuels Respiration Volcanic eruption

Describe Andesitic Lava: What is it's viscosity and what is it mostly composed of?

What hormonal change occurs after fertilization that causes the endometrial lining to remain intact so that the fertilized egg can successfully implant in it?

Which are characteristics of all living things? Check all that apply. A. are made of cells B. need energy C. can breathe D. respond to stimuli E. can reproduce F. grow and develop

Which of the following is descriptive of pertussis? a. Initial stage resembling the common old b. Prolonged illness, sometimes symptoms may last for months. c. Bacterial disease treated with erythromycin c. All of these are descriptive of pertussis

Which statement about the cell membrane is true? A. It contains cellulose and sugars that are involved in communication. B. It is present in animal cells only. C. It is rigid and elastic for supporting the cell's shape. D.

Hailey needs to identify internal costs so she can price her product accordingly. Which cost will be part of Hailey's calculation? A. cost of endangering species B. cost of deforestation C. cost of air pollution D. cost of disposing by-products E.

What is the main difference between prokaryotic and most eukaryotes cells? A. Eukaryotic cells from multi-cell tissues, Prokaryotic cells are single cell. B. Eukaryotic cells from single cell, Prokaryotic cells are multi-cell tissues. C.

List (A) the primary materials necessary for and (B) The materials produced by photosynthesis