Identify the process at I.

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1.4 Step 1: Identify the process at I. 1.4.1 Fertilisation Step 2: State the type of cell division at II. 1.4.2 Mitosis Step 3: Name two extra-embryonic membranes produced by structure C (blastocyst). 1.4.3 Amnion and Chorion Step 4: Identify the stages of development. 1.4.4 (a) Ovum 1.4.4 (b) Morula 1.4.4 (c) Blastocyst Step 5: Name the part of the female reproductive system where these events occur. 1.4.5 Fallopian tube (or Oviduct) Step 6: Determine the chromosome number for a cell at A (ovum) leading to Down Syndrome. Down Syndrome is Trisomy 21, meaning an extra chromosome 21. A normal ovum has 23 chromosomes. An ovum leading to Down Syndrome would have an extra chromosome 21. 1.4.6 24 2.4 Step 1: Identify the labelled parts of the diagram. 2.4.1 (a) Uterus (or Uterine wall) 2.4.1 (b) Umbilical cord 2.4.1 (c) Placenta Step 2: State two functions of the fluid in part B (amniotic fluid). 2.4.2 Protects the foetus from mechanical shock/injury. Maintains a constant temperature for the foetus. Step 3: Name one system in the baby's body that takes over the function of part D (placenta) after birth. The placenta is responsible for gas exchange, nutrient supply, and waste removal. 2.4.3 Respiratory system (for gas exchange) Step 4: Explain one negative impact on foetal development if part D (placenta) is significantly reduced. 2.4.4 A significantly reduced placenta would lead to insufficient transfer of oxygen and nutrients to the foetus, resulting in poor growth and development (e.g., intrauterine growth restriction).

Identify the process at I.

Step-by-step solution

Part 1.4· 6 steps

Identify the process at I.

State the type of cell division at II.

Name two extra-embryonic membranes produced by structure C (blastocyst).

Identify the stages of development.

Name the part of the female reproductive system where these events occur.

Determine the chromosome number for a cell at A (ovum) leading to Down Syndrome.

Part 2.4· 4 steps

Identify the labelled parts of the diagram.

State two functions of the fluid in part B (amniotic fluid).

Name one system in the baby's body that takes over the function of part D (placenta) after birth.

Explain one negative impact on foetal development if part D (placenta) is significantly reduced.

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