Problem 4 - Objective Biology for NEET

Question

Who was the German botanist to study the different cells forming plant tissues? (a) Schleiden (b) Schwann (c) Rudolf Virchow (d) None of these

Step-by-Step Solution

Answer

The correct answer is (a) Schleiden.

Step 1: Recall Knowledge about German Botanists

Reflect on your knowledge about German botanists who contributed to the study of cell formations in plants.

Step 2: Match the Name

Match the correct option among the choices given: Schleiden, Schwann, Rudolf Virchow, or None of these.

Key Concepts

Matthias Schleiden

Matthias Schleiden was a renowned German botanist and a co-founder of cell theory, who profoundly modified our understanding of plant structure. Born on April 5, 1804, in Hamburg, Schleiden was initially trained in law before his deep interest in botany took precedence. His major contribution emerged in 1838 when he declared that all plant tissues are composed of cells and that the nucleus of the cell was a crucial part of its development.

It was through meticulous observation using a microscope that Schleiden perceived this fundamental unity of structure in plant tissues. He suggested that the cell is the basic unit of all plant life, which was a revolutionary concept at the time, paving the way for future research. His emphasis on the importance of the nucleus in cell division was particularly influential. Schleiden, in collaboration with Theodor Schwann, laid down the first two principals of modern cell theory, forever altering the course of biological sciences.

Cell Theory

Cell theory stands as one of the fundamental doctrines of biology, asserting that all living organisms are composed of cells, and that the cell is the basic unit of life. Inspired by the work of Matthias Schleiden and his counterpart Theodor Schwann, this theory was formally articulated in 1839, although rudiments of the concept can be traced back even further.

The core principles of cell theory include the following:

• All living organisms are made up of one or more cells.
• The cell is the most basic unit of life, responsible for all of life's functions.
• All cells arise from pre-existing, living cells.

The theory has since been expanded upon, but these foundational elements remain central to our understanding of biology. Since then, cell theory has supported the development of many other biological principles, including the ways in which diseases affect organisms on a cellular level.

Plant Tissue

Plant tissue comprises groups of cells that work together to perform specific functions within the plant. It is structural and functional, making it critical to the life of the plant. The study of plant tissues is known as plant anatomy, with Matthias Schleiden being one of its pioneers.

Plant tissue can be broadly categorized into three types:

• Meristematic tissue: which consists of actively dividing cells and is responsible for plant growth.
• Permanent tissue: which includes cells that are no longer actively dividing but are specialized for particular functions, like photosynthesis, transport, or storage. This includes tissues such as epidermis, xylem, phloem, and parenchyma.
• Secretory tissue: which is responsible for secreting substances like resins, oils, and nectars.

Understanding plant tissue is crucial for various applications such as agriculture, botany, and environmental science, where knowledge of how plants grow and function is vital.