Which of the following best describes scientific theory?

A.) it cannot be changed

B.) it explains very few observations

C.) it is basically speculation

D.) it may change

If W stands for long wings, write the symbols for the alleles of each parent fly

Why would a taiga forest exist in arizona?

By which process is water lost

The respiratory system is best described as: a) The system which delivers oxygen to the bloodstream and takes away carbon dioxide. b) The system which provides the ability to burn all nutrients in the cells.

Which of the following types of reproductive barriers separates two species of sea cucumbers, whose sperm and eggs often bump into each other but do not cross-fertilize because of incompatible proteins on their surfaces?

Which class of immunoglobulins sensitizes cells to allergens?

Which statement about somatic mutations is true? A. They exist in all the cells of the body. B. They are acquired through exposure to mutagens. C. They are inherited via sperm and egg cells. D. They are passed on to offspring.

In year three the farmer discontinue the use of the insecticide Which statement would best predict the population in generation 4

What happens to carbon atoms during cellular respiration or fermentation?

How are photosynthesis and chemosynthesis similar?