A cell-
(A) Cells were first discovered by Robert Hooke
(B) He observed cells in cork slice
(C) Amoeba is a single cell organism
(D) Every cell has only two features, the plasma membrane and the nucleus
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (A), (B) and (C) only
The cell is the basic unit of life; every living thing is made of one cell or of many.
(A) Cells were first discovered by Robert Hooke Correct. Robert Hooke first saw and named cells in 1665, using a microscope of his own design.
(B) He observed cells in cork slice Correct. In a thin slice of cork he saw small compartments like a honeycomb and called them cells.
(C) Amoeba is a single cell organism Correct. Amoeba is unicellular: one cell carries out all its life processes.
(D) Every cell has only two features, the plasma membrane and the nucleus Incorrect. Every cell has three features: the plasma membrane, the nucleus and the cytoplasm (bacteria have only a nucleoid, not a true nucleus).