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IMSO 2016 Science International - Theory I Question 7

IMSO Science · IMSO 2016 Science International - Theory I

Question 7

A biology teacher gave her students a culture of colourless unicellular organisms to study. The students observed that each cell was about 100 µm diameter, had a single nucleus, was rectangular in shape, and did not burst when placed in a hypotonic solution. There are some statements related to those explanations:

i. They were bacteria

ii. They were eukaryotic.

iii. They were animal cells.

iv. They probably had a cell wall outside of the cell membrane.

v. The organisms were cells that normally grew in salt water.

Which statements about these organisms are supported by the observations?
  1. ii and v
  2. ii, iii, and iv
  3. ii, iii, and v
  4. ii and iv