biology

All known living things are made up of __.

one or more cells.

The cell is the basic and unit of all living things.

structural and functional

All cells arise from __ cells by division.

pre-existing

The __ observed and described single-celled organisms and improved the microscope.

Anton van Leeuwenhoek

Robert Hooke coined the term __ after observing cork through a microscope.

cell

Matthias Schleiden concluded that all __ parts are made of cells.

plant

Theodor Schwann concluded that all __ parts are made of cells.

animal

Rudolf Virchow stated 'Omnis cellula e cellula' which means __.

All cells arise from pre-existing cells

During the G1 phase, the cell __ and does normal cell functions.

grows

In the S phase, the cell copies its __.

DNA

During the M phase, the cell divides into __ identical cells.

two

Cytokinesis is the process where the __ splits.

cytoplasm

A rigid outer layer that provides structural support in plant cells is the __.

cell wall

__ are sites of photosynthesis in plant cells.

Chloroplasts

Centrioles are involved in __ and the formation of cilia and flagella.

cell division

Meiosis reduces the chromosome number by half, creating __ haploid cells.

four

The purpose of meiosis is to produce __ in animals.

gametes

Genetic variation in meiosis is achieved through __ and independent assortment.

crossing over