CIE IGCSE Biology (Definitions) - based on 2015 syllabus

1. the fundamental process by which plants manufacture carbohydrates from raw materials using energy from light (14)
5. the ability to detect or sense changes in the environment (stimuli) and to make responses (11)
7. proteins that function as biological catalysts (7)
8. genetic makeup of an organism in terms of the alleles present (e.g. Tt or GG) (8)
10. a system consisting of the central nervous system (brain and spinal cord) and the peripheral nervous system, which together serve to regulate and coordinate body functions (7, 6)

2. a group of organs with related functions, working together to perform body functions (5, 6)
3. a unit containing all of the organisms and their environment, interacting together, in a given area e.g. decomposing log or a lake (9)
4. a structure made up of a group of tissues, working together to perform specific functions (5)
6. having two identical alleles of a particular gene (e.g. TT or gg). Two identical homozygous individuals that breed together will be pure-breeding (10)
9. an allele that is only expressed when there is no dominant allele of the gene present (e.g. t or g) (9)

Comments