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2026Q2(iii)(e)The Reproductive System
Odd one outModerate1 mark
2(iii)

Choose the odd one out from the following terms and name the category to which the others belong:

Morula, Blastocyst, Oviduct, Foetus

Topic: Stages of embryonic development

Previous-year question practice database

Answer

Exam answer

Odd one out: OVIDUCT. Category of the others: STAGES OF EMBRYONIC DEVELOPMENT.

Explanation

Morula, blastocyst and foetus are successive STAGES in the development of the embryo: the zygote divides to form a solid ball of cells, the MORULA this hollows out to become the BLASTOCYST, which implants in the uterine wall after about eight weeks, when the organs are recognisable, the embryo is called the FOETUS

The OVIDUCT (fallopian tube) is not a stage but a STRUCTURE — the tube along which the ovum travels and in which fertilisation normally takes place.

THE DISTINCTION being tested is between a PROCESS and a PLACE. Three of the terms answer "what is it now?" and one answers "where is it?". Whenever a list mixes stages with anatomy, that is almost always the intended division.

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