What are alveoli? A. Part of a red blood cell

B. Air sacs used during respiration

C. Tubes that connect the heart to the lungs

D. Carbon dioxide molecules

If garbage is left on the street flies in microbes can arise from nothing to Feed on it true or false

The layer off the earth that is composed of large plate rocks is?

What kind of water is found in the benethic zone of a lake

True or false? the purkinje fibers are considered the pacemaker of the heart.

About one hundred thousand years ago, very fluid lava started erupting slowly and gently from a place near a plate boundary. What best describes the slope of the mountain that resulted from such a phenomenon? A.

Protein is found in plant and animal products. a. True b. False

During dna replication a. one template strand must be degraded to allow the other strand to be copied. b. the template strands must separate so that both can be copied. c.

When a population continues to grow past its carrying capacity the population will go extinct? true or false

Which statement describes how mutualism and commensalism are similar? A. At least one organism is hurt or harmed by the relationship. B. The relationship is beneficial to neither organism. C. At least one organism benefits from the relationship. D.

Give an example of a stimulus, and explain how your nervous system and muscular system work together to respond to it. Use complete sentences.