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IB Biology HL D3.1.16 Hl Blastocyst and Implantation Questions

Identify the blastocyst formed after cleavage and relate its inner cell mass to the implantation stage in IB Biology HL D3.1.16.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify a blastocyst as the hollow embryo formed after cleavage divisions, with an inner cell mass.

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Study D3.1.16 (HL)—Blastocyst and implantation conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

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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