In birds, if the offspring require extensive care, usually involving both the male and female, they are called
A. sympatric species.
B. altricial species.
C. precocial species.
D. semelparous species.
E. iteroparous species.
Answer: B
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The procedure lithotripsy is used to treat ____
a. chronic hypertension b. metabolic acidosis c. hemodialysis d. polycystic kidney disease e. kidney stones
Why do certain cells of the lungs produce mucus? Select all correct choices
A. to decrease the surface tension (of liquids) in the lung B. to trap pathogens and guard against infection C. to cause oxygen to go into solution and diffuse into the bloodstream D. to prevent the diffusion of blood into the alveoli
A biome is most specifically defined as ____
a. a vegetation type plus its associated microorganisms, fungi, and animals b. a biological community and the physical environment with which it interacts c. the total dry weight of plants present in a specific area at any given time d. an assemblage of species living in the same place e. a group of organisms of the same species living together at one time
Objects that are not actively moving but have the capacity to do so are said to possess:
A. entropy B. kinetic energy C. potential energy D. sound energy