The term interface can be used to describe the surface across which molecules and ions are exchanged, often diffusing between external and internal environments or between organ systems. What part of the respiratory system forms the interface between the respiratory system and the circulatory system?
A. Alveoli
B. Bronchioles
C. Pharynx
D. Trachea
Answer: A
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Which of the following best explains both the growth of a vine up the trunk of a tree as well as the directional growth of a houseplant toward a window?
A) nastic movement B) taxic movement C) tropism responses D) morphological responses E) acclimation
After death, the lack of ATP stops the dissociation of cross-bridges, and the muscle is locked in a stiff, rigid state called ________.
Fill in the blank(s) with the appropriate word(s).
Milk is a type of protein, so cells that secrete milk likely have lots of which organelle?
a. ribosomes b. nuclei c. cytoskeleton d. cytoplasm
You construct two species-area relationships for terrestrial plants, modeling both with the relationship log S = log c + z log A. One relationship is for data collected from islands of different sizes. The other is for data collected from continental areas over a similar size range. Which of these relationships is likely to have the greater slope, z?
A) the one for islands B) the one for continental areas C) neither A nor B