Complete Table 2.1 by putting ticks (✓) in the boxes to indicate which chemical elements each biological molecule is made from.
Draw a line from each small molecule to the large molecule that it makes. Draw four lines. The small molecules shown are: amino acid, fatty acid, glucose, glycerol. The large molecules shown are: glycogen, oil, protein.
Complete the sentences about excretion: “Excretion is the [BLANK] of waste products from [BLANK] and substances that are present in excess of requirements. A kidney excretes [BLANK], excess [BLANK] and excess water.”
State the name of an organ in the human body that removes carbon dioxide from the blood.
State the letter of a structure in Fig. 2.1 that removes excess water.
State the letter in Fig. 2.1 that shows the urethra.
State the name of the structure labelled C in Fig. 2.1.
State the name of the vein that carries blood away from the kidneys.
State two further characteristics of living organisms.