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Biology
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describe the structure of the cardiovascular system, considering causes, resulting outcomes and treatment of coronary heart disease (CHD)

describe and visualise heart and CVS structure to begin to understand the underpinning principles of the heart, arteries and veins. build upon these principles with regard to coronary heart disease and th...

RM
Answered by Raffaele M. Biology tutor
2139 Views

Before a cell divides during the process of mitosis, it must duplicate its DNA. Describe the process of DNA replication.

DNA helicase breaks the hydrogen bonds between the two strands of the DNA helix, separating them. Each strand can then act as a template for the synthesis of new DNA. Free nucleotides can then attach to t...

JC
Answered by Jen C. Biology tutor
2268 Views

Describe the process of ventilation in humans. (4 marks)

During inhalation, the intercostal muscles contract causing the rib cage to move up and out. The diaphragm also contracts and flattens. This causes the thorax to expand, increasing the volume and decreasi...

EC
Answered by Ella C. Biology tutor
2965 Views

Compare type 1 and type 2 diabetes

Type 1 is insulin-dependent diabetes and is caused due to the underproduction of insulin, because the body attacks its own beta-cells which are needed to produce insulin (autoimmune disease). This means t...

ME
Answered by Maria E. Biology tutor
2362 Views

What are three factors that can affect the rate of photosynthesis?

Carbon dioxide levels, light and temperature

ME
Answered by Maria E. Biology tutor
3062 Views

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