Scientific theories, such as the theory of evolution, must be

A - neither testable nor observable

B - testable and observable

C - observable

D - testable

All enzymes are proteins true or false

Which is a product in the calvin cycle

Measure of the energy in food

Dna is replicated which base pair will bond to cytosine

What kind of charge would The oxygen Atoms have compared to the hydrogen Atoms

How is plasma constructed in blood?

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.