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What are the differences between Autocratic, Laissez-Faire and Democratic leadership styles?

Autocratic - manager exerts control over all decisions and receives very little or no input from employees or group members. Autocratic leaders make decisions based on their own thoughts and rarely seek advi...
Answered by • Business Studies tutor
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Explain the ways in which the structure of alveoli is related to its function

The alveolar epithelium is a site of rapid diffusion, consequently it is very thin, only one cell thick, providing a short diffusion pathway.Alveoli have constant blood flow and ventilation, maintaining a st...
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Answered by Joanne M. • Biology tutor
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Explain Cohesion-Tension Theory

Transpiration of water through stomata creates low potential at the top of the xylem. Water molecules stick together via hydrogen bonds in a process known as COHESION . This occurs because water molecules ar...
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Answered by Joanne M. • Biology tutor
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Describe and explain the photoelectric effect.

Consider a single photon (a particle of light) of a particular energy striking the surface of a metal. If the energy of this photon exceeds the work function of the metal, it will remove a single electron - ...
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Answered by Abbie R. • Physics tutor
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Explain how red-shift provides evidence for the Big Bang theory.

Red-shift describes the phenomenon whereby the wavelength of light from a source increases as it travels through spacetime, hence observed as being 'shifted' to the red end of the spectrum (as red light has ...
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Answered by Abbie R. • Physics tutor
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