How is This Doubling?

Use the phenomenon below to answer the questions. The image shown is taken with an electron microscope and the first object is approximately 170 microns across.
NGSS Phenomena: Two green half circles start out touching at the center. They slowly start to spread apart while another two halves grow in between them, making two green circles at the end.
Jeremy Pickett-Heaps, University of Melbourne

1. The animation shows cell dividing into .

2. Based on what you know about living things, make an argument about whether or not this is a single-celled organism splitting into two or a multi-cellular organism.

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This fill in question aligns to the following standards

  • LS1.A: Structure and Function

  • MS-LS1-1

This free response question aligns to the following standards

  • LS1.A: Structure and Function

  • Scale, Proportion, and Quantity

  • MS-LS1-1

  • Planning and Carrying Out Investigations

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