Activity 1Mixed-up meanings
Pupils should try to fill in the blanks in the final column with the words that match the meanings. The words needed are listed, randomly mixed, in the first column.
This exercise should not be tackled in isolation, but by a reader with access to the story itself: The contexts in which words are used provide powerful clues to their meanings.
Word should be
watery liquid that surrounds an embryo. It is contained in a thin, tough sac called the amnion.
kept in reserve in case it’s needed
the building block of all living things except viruses
fertilisation of egg by sperm
something that makes it what it is
of a disease: in which the body or mind works less and less well, as time goes on
grow bigger and better formed
illness, often caused by something going wrong, rather than infection
giant molecule that contains the genes; short for deoxyribonucleic acid
the outermost of the three layers of an embryo, which grows into the skin and nervous system
early stage in development of an animal or plant following fertilisation of an egg cell. In humans the word is used for the fertilised egg during its first seven weeks of existence; from the eighth week on it is called a foetus.
of the embryo
the innermost of the three layers