EVERYDAY SCIENCE

Detailed explanation-1: -Janet Plowe was born in 1905 in California. Plowe, a student of William Seifriz, was among the pioneers of micro-injection into plant cells. She discovered the elasticity and composition of several large organelles, and the cell membrane itself.

Detailed explanation-2: -Who discovered plasma membrane? In the late 1600’s Robert Hooke’s discovery of cells led to the proposal of the cell theory. Later in 1839, Schwann studied the different types of animal cells and reported that they have a thin outer layer which is now known as the plasma membrane.

Detailed explanation-3: -The correct answer is Robert Hooke. A cell membrane is also called the plasma membrane, a thin membrane that surrounds every living cell.

Detailed explanation-4: -The unit membrane concept that says that all membranes have an underlying bilayer composed of phospholipids was originally proposed by Danielli and Davson in 1935. This concept extends to a wide variety of membranes from different organisms, each of which has a specific function.

Detailed explanation-5: -History. A plant cell wall was first observed and named (simply as a “wall") by Robert Hooke in 1665.