Our blood contains red blood cells. Their main function is to
The food which contains the most carbohydrate is
lettuce fish bread chicken
The substance which is not excreted by the human body is
carbon dioxide faeces urine water
A menstrual period occurs in a woman approximately
every day once a year every twenty-eight days twice a year
The substance which passes across the surface of the lungs into the blood is
carbon dioxide glucose oxygen water
The condition that is not needed for the germination of seeds is
oxygen soil suitable temperature water
The type of organism which has a backbone is
a fungus a reptile an arthropod an insect
The type of organism which photosynthesises in a food chain is a
herbivore producer primary consumer secondary consumer