The diagram above illustrates a reproductive process in a farm animal. Study it and answer the question.
The parts which protect the foetus from mechanical injury are labelled

The diagram below illustrates a reproductive process in a farm animal. Study it and answer the question.
The foetus obtains dissolved oxygen and nutrients from the dam through the parts labelled

The risk of production in agricultural business is borne by the

The bacterium which is responsible for conversion of ammonium compounds to nitrites in the nitrogen cycle is

Study the table below and use it to answer the question

The useful life represented by Y in the illustrated table is