DP Biology (first assessment 2025)

Test builder »

Question 21M.1A.SL.TZ1.17

Select a Test
Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.1A.SL.TZ1.17
Level SL Paper 1A Time zone TZ1
Command term Question number 17 Adapted from N/A
17.
[Maximum mark: 1]
21M.1A.SL.TZ1.17

A two-cell sea urchin (Echinoidea) embryo was physically separated by scientists into two cells. Each cell, through further embryonic development, became an adult sea urchin.

[Source: Clker-Free-Vector-Images/Pixabay.]

 

What is the relationship between the two adult sea urchins?

A. They are equivalent to non-identical twins.

B. Half of the genes would be the same.

C. Both adults would have haploid cells.

D. They are clones.

[1]

Markscheme

D

Syllabus sections