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Evaluate sexual selection theory as an explanation of human relationships

There is supporting evidence for the role of sexual selection as a result of anisogamy. Buss et al (1989) carried out a survey of 10,000 adults in 33 countries . He asked questions relating to a variety of a...
CW
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Describe the characteristics of a destructive wave

Destructive waves have a weak swash and a strong backwash, thus material is removed from the beach. They are strong waves created when the wind is strong and has been blowing for a long time or in stormy con...
CW
Answered by Charlie W. • Geography tutor
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Why can heat only be transferred through a vacuum by radiation, and not conduction or convection? (3)

Heat transfer by conduction and convection works by particles colliding and transferring energy, as there are no particles in a vacuum heat transfer can only occur by radiation. This is because radiation inv...
JW
Answered by James W. • Physics tutor
43992 Views

Using your knowledge of the Circulatory System, describe & explain how and why an increase in intensity of exercise leads to an increased heart rate.

Firstly we must understand what exercise does to the body and the Circulatory system. We know that muscles need ATP to contract, this is demanded much more during a more strenuous exercise. ATP is created du...
TD
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Whats the difference between type 1 and type 2 diabetes?

There are important differences between type 1 and type 2 diabetes. They happen in people of different ages and present differently. Type 1 diabetes is found in younger people and is because your body has st...
KI
Answered by Katba I. • Biology tutor
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