Explain the structure of human sperm with a neat labelled diagram.
Explain the structure of human sperm with a neat labelled diagram.

Explain the structure of human sperm with a neat labelled diagram.
Describe a transmissible disease as a disease in which the pathogen can be passed from one host to another
Describe that a double circulation provides a low pressure circulation to the lungs and a high pressure circulation to the body tissues
Describe the functions of the types of human teeth in physical digestion of food
Describe a sustainable resource as one which is produced as rapidly as it is removed from the environment so that it does not run out
Explain how fish stocks can be conserved using education, closed seasons, protected areas, controlled net types and mesh size, quotas and monitoring