NEW
Font size
WorksheetsSINGAPORE SCIENCE ODYSSEY
Total questions: 16
Worksheet time: 16mins
What path does oxygen take as it enters the human body?
A
B
C
D
Which of the following statements about the transport of carbon dioxide in blood is true?
Carbon dioxide is converted into carbonic acid by the enzyme carbonic anhydrase.
Carbon dioxide molecules react with water to form lactic acid.
Carbon dioxide is carried in blood plasma in the form of carbonic acid.
Carbon dioxide is carried in red blood cells as carboxyhaemoglobin.
What is the role of cilia in the respiratory system?
They trap dust and bacteria
They move mucus up the trachea
They move air down the trachea
They increase the surface area for gaseous exchange
What changes occur in the diaphragm and intercostal muscles during inspiration?
Which of the following correctly states the pathway in which water molecules leave a plant during transpiration?
Which of the following graphs shows the effect of increased temperature on the transpiration rate of a plant?
The transpiration rate of a plant varies throughout the day, depending on the environmental conditions. Which of the following sets of environmental conditions would result in the highest transpiration rate?
A
B
C
D
Which of the following statement is true?
White blood cells are involved in the clotting of blood with the help of platelets
About 50% of the volume of blood is made up of plasma
Lymphocytes are cells that engulf bacteria and produce antibodies
Red blood cells are biconcave in shape to increase their surface area to volume ratio
Haemoglobin is an important pigment in red blood cells because __________.
it ensures that blood contains oxygen
it ensures that oxygen is not wasted
it binds to oxygen reversibly and transports oxygen to cells in the body
it forms oxyhaemoglobin which is a highly stable compound
Which of the following correctly identifies the vascular tissues that transport amino acids, mineral salts, sugars and water in a plant?
Water
Mineral salts
Water and Mineral salts
Water, mineral salts and amino acids
A
B
C
D
A
B
C
D
