Question

Open the brackets using the verbs in the appropriate form.
1) In 1632–1723, Antonie van Leeuwenhoek (to teach) himself to make lenses, (to construct) basic optical
microscopes and (to isolate) protozoa from rain water, and bacteria from his own mouth.
2) The study of cells (to call) cell biology, cellular biology, or cytology.
3) The cell theory (to develop) in 1839 by microbiologists Schleiden and Schwann.
4) The activity of an organism (to depend) on the total activity of independent cells.
5) The Golgi body (to find) near the nucleus and endoplasmic reticulum.
6) Over the past 30 years, numerous studies (to conduct) to explain processes such as membrane traffic and
organelle biogenesis.
7) Organelle biogenesis (to be) the process by which new organelles (to make).
8) The belief that life forms (can, to occur) spontaneously (to contradict) by Louis Pasteur.

Answer 1

1  taught, constructed

2 is called

3 was developed

4 depends

5  is found

6  have been conducted

7  is

8 can occur