1. When did Robert Hooke discover cell?
2. Who among Schleiden and Schwann was zoologis
and botanist?
3. Who developed electron microscope ?
4. What is shape of a RBC ?
5. What is the peculiarity of nerve ceil ?
6. What will happen if a plant cell is placed in
hypertonic solution ?
7. What will happen if an animal cell is placed
hypertonic solution ?
8. Cytoplasmic bridges between adjacent plant cel
are called ?
Answers
Answer:
1) 1665
2)Matthias Jacob Schleiden was a German botanist who, with Theodor Schwann, cofounded the cell theory. In 1838 Schleiden defined the cell as the basic unit of plant structure, and a year later Schwann defined the cell as the basic unit of animal structure
3)Ernst Ruska
4)The shape of the human red blood cell (RBC) is known to be a biconcave disc.
5)The nerve cells are also known as neurons. ... They are almost the ICT tools because they collect and combine the information received from other sensory cells and form an output that serves as an input for the other sensory, nerve cells, glands or musclecells. Nerve cells are little computers in a body
6)Hypertonic solutions have less water ( and more solute such as salt or sugar ) than a cell. ... If you place an animal or a plant cell in a hypertonic solution, the cell shrinks, because it loses water ( water moves from a higher concentration inside the cell to a lower concentration outside ).
7)If you place an animal or a plant cell in a hypertonic solution, the cell shrinks, because it loses water ( water moves from a higher concentration inside the cell to a lower concentration outside ). ... A single animal cell ( like a red blood cell) placed in a hypotonic solution will fill up with water and then burst.
8)In plants cell wall possesses minute cytoplasmic bridges between adjacent cells. They are called as plasmodesmata. A plasmodesmata is a fine cytoplasmic canal lined by plasma membrane and often having an ER tubule called as desmotubule.
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1. Robert Hooke discovered the cell in 1665.
2. Schleiden was botanist and Schwann was zoologist.
3. Ernst Ruska and Max Knoll.
4. Biconcave disc
5. The nerve cells are known as Neurons. They are peculiar because they are the important communication and information tool of organisms.
6. & 7. If a animal cell or plant cell is placed in a hypertonic solution, so the cell shrinks because it loses water as water moves from higher concentration inside the cell to lower concentration outside the cell.
8. Plasmodesmata