Subject Answers

Biology

Explain how it is possible for two parents without blue eyes (a recessive trait) to have a child with blue eyes

When the parents are heterozygous individuals (have both dominant and recessive alleles), they can have an offspring with a recessive trait (homozygous recessiv...

Compare and contrast the structure and properties of phospholipids with those of triglycerides.

The similarities and differences between phospholipids and triglycerides are explained below:

State whether arteries carry blood towards or away from the heart and then give two features of arteries relating to this role

There are 3 major types of blood vessels

Arteries
Veins
Capillaries

Arteries are those blood vessels that are responsible...

Describe the main differences between mitosis and meiosis

There are two different types of cell division.

What does the hormone insulin do?

Insulin is a hormone that is protein in nature. It consists of two polypeptide chains. It is produced from pancreas that is both exocrine and endocrine gland.&n...

Describe how an action potential is generated.

Action potential comprises of four major stages

Explain the process of osmosis and give an example of where this occurs

Osmosis is the movement of water molecules from the region of high water potential to low water potential through partially permeable membranes.High water poten...

Explain how blood glucose concentration is controlled in the body

Blood glucose level is maintained with the help of two most important hormones

"During large heart attacks the chordae tendineae can be damaged. Use your knowledge of the heart’s structure and the diagram below to to explain how damage to these structures may lead to backflow of blood from the right ventricle to the right atrium."

Heart is the pumping organ and one of the most important parts of the circulatory system. It can be divided into four chambers: right and left ventricles and ri...

Evaluate the pros and cons of breastfeeding.

Breastfeeding is the best way to provide immunity to the child as antibodies are directly transferred from mother to baby; this is something that cannot be prov...

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