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Department of Biology

Test your knowledge. See if you can identify what is under the microscope. Click on the letter beside the correct answer. Good luck!

HIV virus
mature female sex cell
nerve cell
human lung tissue
is the best answer.
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The egg (or ovum) is the mature female sex cell. The egg here is surrounded by several layers of cells, the innermost layer (the corona radiata) help to nourish the egg during its initial growth and maturation.