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Outline how crossing over and random orientation promotes genetic variation.

crossing over and random orientation of chromosomes occurs in Meiosis I;o Random orientation: ▪ Random orientation of homologous chromosomes creates genetic variation. ▪ There are over 8 million ways that ch...
Answered by • Biology tutor
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Why does serum lactate concentration increase during intense exercise in normal individuals?

Skeletal muscle has a variable requirement for energy (ATP) which depends on how hard the muscle is working. During severe exercise, when demand for ATP is high , the muscle can become temporarily starved of...
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Answered by Kalvin S. • Biology tutor
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Describe the structure and function of the heart valves

There are four heart valves in total. The triscuspid valve is between the right atrium and ventricle. The bicuspid valve is between the left atrium and ventricle. These are the atrioventricular valves and st...
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Answered by Rajan M. • Biology tutor
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Describe how starch is digested mechanically and chemically from the time we eat it in our mouth until it reaches our small intestine where it's absorbed.

The food firstly is mechanically digested in the mouth by the action of our teeth and tongue when we bite and churn it around. The saliva secreted in our mouth contains amylase which chemically breaks down t...
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Answered by Louise P. • Biology tutor
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What is the action of Insulin in glucose regulation?

Insulin is a hormone that is produced by beta cells in the Islets of Langerhans in the pancreas. A hormone is a chemical substance that is transported in the blood and stimulates particular cells to perform ...
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Answered by Nicole M. • Biology tutor
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