When placed in the same habitat, Paramecium aurelia will replace Paramecium caudatum. This is an example of:
A) competitive exclusion.
B) commensalism.
C) mutualism.
D) parasitism.
Ans: A) competitive exclusion.
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In a muscle contraction event, ____ causes the release of calcium from the sarcoplasmic reticulum
a. the hydrolysis of ATP b. the formation of ATP c. the formation of the actin-myosin cross-bridge d. a signal from a motor neuron e. the shortening of the sarcomere
Liquid water ________.
A) is less dense than ice B) has a specific heat lower than that of most other substances C) has a heat of vaporization higher than that of most other substances D) is nonpolar
Explain the concept of selective toxicity
What will be an ideal response?
Examine the electron micrograph of the mitochondrion on the right.
(a) What portions of aerobic respiration occur in region a? (b) What substance is produced as hydrogen ions cross from the space between the inner and outer membranes into region a? (c) What portion of cellular respiration takes place in the cytoplasm outside of this cell?