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IB Biology HL D3.1.16 Hl Blastocyst and Implantation Questions

Trace cleavage from the morula to a blastocyst with an inner cell mass, then follow implantation in the endometrium and the start of placental development.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify a blastocyst as a hollow ball of cells.

IB Biology HL D3.1.16 Hl Blastocyst and Implantation Questions question 1

[Maximum number: 1]

What is a blastocyst?

A

An unfertilized egg surrounded by follicle cells

B

An unfertilized egg cell expelled by menstruation

C

The follicle when it has swelled up with fluid

D

The embryo when it has become a hollow ball of cells

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