Question

A scientist was looking into a microscope and saw a single-celled organism that lacked a membrane-bound nucleus and other organelles. What was the scientist looking at?

a) Bacteria
b) Plant cell
c) Animal cell
d) Protist

Answer 1

The scientist was looking at a bacteria, which is a prokaryotic cell without a nucleus or membrane-bound organelles.

Step-by-step explanation:

The scientist was looking at a bacteria. Bacteria are prokaryotic cells, which means they lack a membrane-bound nucleus and other membrane-bound organelles. They have a simple structure with a cell wall and a plasma membrane, and their DNA is located in the nucleoid region of the cell.