Which of the following is true concerning homeostasis?
A) Homeostasis is the maintenance of a rigid internal environment with no variation.
B) Homeostasis allows for major fluctuations in body conditions.
C) The maintenance of homeostasis relies mainly on positive feedback.
D) Homeostasis is the maintenance of a relatively stable internal environment.
Answer: D
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Answer the following statements true (T) or false (F)
1. Temperature influences the solubility of gases in water. 2. All gases are equally soluble in water. 3. Fishes exhibit a method of ventilating their gills termed "tidal ventilation." 4. Mammals fill their lungs using a negative pressure mechanism. 5. The lungs of a bird expand as it inhales and contract as it exhales.
Both walnut and Gingko trees lose their leaves in the fall when day length starts decreasing. Based on these observations one may conclude that many tree species will lose their leaves in the fall in response to decreasing day length. This statement is an example of:
A. inductive reasoning B. a theory C. deductive reasoning D. an experiment
Which of the following structures manufactures the components of ribosomes?
A) nucleus B) cytoplasm C) endoplasmic reticulum D) nucleolus
The relative number of mitochondria in a cell would be a general indicator of the extent of ________ occurring within that cell.
A. facilitated transport B. osmosis C. active transport D. osmosis and diffusion E. diffusion