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Explain why it is important for a mammal to regulate its body temperature

The optimum temperature for enzymes in the body is around 37oC. If the body temperature falls below this temperature then enzymes will work too slowly for body process to occur fast enough the keep the mamma...
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Answered by Catriona H. • Biology tutor
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Describe how animals survive adverse weather conditions

One method of doing this is dormancy. Some animals spend a period of their life cycle dormant in order to lower their metabolic expenditure in conditions which would otherwise require high energy to survive....
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Answered by Jenni M. • Biology tutor
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Describe how regulators maintain a constant body temperature?

Receptors in the skin send messages to the hypothalamus in the brain which then sends nerve impulses to effectors around the body. Examples of effectors include sweat glands, blood vessels and muscles. The b...
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Answered by Katie S. • Biology tutor
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What are some differences between RNA and DNA?

RNA is single stranded, whereas DNA is double stranded. RNA has a uracil base instead of DNA's thymine base. RNA has a ribose sugar, whereas DNA has a deoxyribose sugar.
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Answered by Holly G. • Biology tutor
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You and your lab partner have isolated a strand of DNA which you wish to amplify. You decide to carry out a polymerase chain reaction. Describe the 3 main temperature changes that occur and what key events happen at these stages.

The polymerase chain reaction (PCR) involves many cycles of heating and cooling in order to amplify a section of DNA. You initially heat the DNA to 92 C : this denatures you double-stranded DNA so that you h...
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Answered by Amy A. • Biology tutor
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