What is the main driving force that directly causes air to flow in and out of the respiratory system? hint: it is the same force that creates blood flow?

Which condition would cause an ecosystem to become unstable?

How is protein synthesis different from dna replication 13.2?

The thermoacidophile Sulfolobus acidocaldarius lacks peptidoglycan, but still possesses a cell wall. Which of the following statements is likely to be an accurate description of this species? a. The optimal pH of its enzymes will lie above pH 7. b.

Classify these animals as vertebrates or invertebrates. starfish: amphibian: bird: octopus: coral: fish: clam: reptile:

Why do the paleoanthropologists believe that the bones may have been intentionally placed in the cave?

4 most common elements in an organism

What role do insulator sequences play in the regulation of eukaryotic transcription? See Section 13.1 (Page 479). What role do insulator sequences play in the regulation of eukaryotic transcription? See Section 13.1 (Page 479).

Which of the following is a pattern of biogeography that supports the theory of evolution? A. Closely related organisms that live in different environments are often very different from each other. B.

Why is it better that the lungs are spongy rather than empty like a balloon?

Why do red blood cells appear smaller after being exposed to a hypertonic starch solution?