Using the Lincoln index to estimate the population size of wolves, you capture, mark, and release 20 wolves during the precensus period. In the census period 13 marked and 5 unmarked wolves are captured. What is the estimate of the size of the population of wolves that occupy your backyard?

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#Question id: 13195

#Unit 1. Molecules and their Interaction Relevant to Biology

Who contributes to the stability of DNA helix structure?

A. Hydrogen bonding between bases

B. Hydrogen bonding between water and bases

C. Scattering interactions between bases

D. Stacking interactions between bases

CORRECT combination is

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#Question id: 5655

#Unit 5. Developmental Biology

What is the "acrosomal reaction"?

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#Question id: 12178

#Unit 2. Cellular Organization

Following statements are regarding to V-class ATPases.

A. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of an equal number of anions (e.g., Cl−) in the same direction.

B. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of equal numbers of a different cation in the same direction.

C. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of equal numbers of a different cation in the opposite direction.

D. An organelle lumen or an extracellular space to become acidic, movement of protons must be accompanied by movement of an equal number of anions (e.g., Cl−) in the opposite direction.

Which of the following combination is correct?

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#Question id: 3990

#Unit 3. Fundamental Processes

Which of the following statements is true of the attenuation mechanism used to regulate the tryptophan biosynthetic operon in E. coli?

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#Question id: 1176

#Unit 4. Cell Communication and Cell Signaling

The EGF receptor is a(n):