Question 1
HLPaper 1Mucus traps pathogenic bacteria. Mucus also attracts viruses that attack pathogenic bacteria.
What part of the immune system do these viruses resemble in their function?
Question 2
HLPaper 1What is the role of the joint capsule in an elbow joint?
Question 3
HLPaper 1What is a similarity between human and insect muscles?
Question 4
HLPaper 2Describe the role of ADH in human osmoregulation.
Question 5
HLPaper 1The diagram shows the chromosomes derived from a single homologous pair following meiosis in a diploid cell.
Which diagram represents the homologous pair from which these chromosomes were derived?
Question 6
HLPaper 1The table shows the results of blood type tests on samples from four individuals. Which row represents an individual who can accept transfusions from people with blood type AB?
Question 7
HLPaper 1The micrograph shows part of a human sperm cell. Which region of the cell is responsible for the greatest production of ATP?
Question 8
HLPaper 2Outline how the properties of water make it an effective coolant for the body.
Describe how changes in weather conditions affect the transport and loss of water in plants.
Explain how water balance is restored in mammals when they are dehydrated.
Question 9
HLPaper 1Hormones maintain the thickness of the endometrium during pregnancy. However, insufficient levels of hormones in early pregnancy may cause the breakdown of the endometrium, which leads to miscarriage. What could be a cause of miscarriage in early pregnancy?
Question 10
HLPaper 1Which processes require calcium?
I. Muscle contraction
II. Movement of an action potential along an axon
III. Production of the skeleton of hard corals