Which of the following is not correct? (a) Robert Brown discovered the cell. (b) Schleiden and Schwann formulated the cell theory. (c) Virchow explained that cells are formed from pre-existing cells. (d) A unicellular organism carries out its life activities within a single cell.

Haritha,Subject Matter Expert at Edumarz

Solution:The incorrect statement is that Robert Brown discovered the cell. Cells were first identified in cork cells by the scientist Robert Hooke using a microscope. Robert Brown is a botanist famous for the discovery of the nucleus.

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Cell

Living organisms are formed of millions of cells.It is the smallest unit of life.Cell is surrounded by a cell membrane.The fluid that fills inside of the cell is called cytoplasm.Cell organelles of cell include nucleus,mitochondria,endoplasmic reticulum,Golgi complex etc.

Contributions of Robert Hooke

• In 1665,he published Micrographia

• He also described the compound eye of a fly

• He also studied fossil molluscs

Contributions of Robert Brown

• He identified the nucleus of the cell

• He identified new species of plants